{"id":293,"date":"2023-07-06T18:52:35","date_gmt":"2023-07-06T18:52:35","guid":{"rendered":"https:\/\/mathority.org\/it\/determinanti-4x4-con-esempi-complementari-ed-esercizi-risolti\/"},"modified":"2023-07-06T18:52:35","modified_gmt":"2023-07-06T18:52:35","slug":"determinanti-4x4-con-esempi-complementari-ed-esercizi-risolti","status":"publish","type":"post","link":"https:\/\/mathority.org\/it\/determinanti-4x4-con-esempi-complementari-ed-esercizi-risolti\/","title":{"rendered":"Come calcolare il determinante di una matrice 4&#215;4 mediante complementi o cofattori"},"content":{"rendered":"<p>In questa pagina vedremo come risolvere un <strong>determinante mediante addizioni o cofattori<\/strong> e anche <strong>come calcolare il determinante di una matrice di dimensione 4\u00d74<\/strong> . Tuttavia, per risolvere il determinante di una matrice di ordine 4, devi prima sapere come calcolare un determinante utilizzando gli aggiunti di una riga o di una colonna. Vedremo quindi prima come trovare un determinante mediante aggiunti o cofattori, poi come realizzare un determinante di ordine 4 <strong>.<\/strong><\/p>\n<h2 class=\"wp-block-heading\"> Come calcolare un determinante tramite addizioni o cofattori?<\/h2>\n<p class=\"has-background\" style=\"background-color:#dff6ff\"> Un determinante pu\u00f2 essere calcolato sommando i prodotti degli elementi in qualsiasi riga o colonna per i rispettivi <strong>complementi (o cofattori)<\/strong> .<\/p>\n<p> Questo metodo \u00e8 chiamato risoluzione di un determinante mediante aggiunti o cofattori, oppure ci sono anche matematici che ti spiegano anche la regola di Laplace (o il teorema di Laplace).<\/p>\n<h3 class=\"wp-block-heading\"> Esempio di risoluzione di un determinante da parte dei deputati:<\/h3>\n<p> Vediamo un esempio pratico di risoluzione del <a href=\"https:\/\/mathority.org\/it\/determinanti-3x3-esempi-di-regole-sarrus-ed-esercizi-risolti\/\">determinante di una matrice 3\u00d73<\/a> mediante additivi. Facciamo il seguente determinante:<\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-1feaff2f490e464eb2de796be2d7feaf_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\begin{vmatrix} 2 &amp; 3 &amp; 1 \\\\[1.1ex] 0 &amp; -2 &amp; 5 \\\\[1.1ex] 3 &amp; 7 &amp; -4 \\end{vmatrix}\" title=\"Rendered by QuickLaTeX.com\" height=\"86\" width=\"94\" style=\"vertical-align: 0px;\"><\/p>\n<\/p>\n<p> Per prima cosa dobbiamo scegliere una colonna o una riga del determinante. In questo caso <strong>scegliamo la prima colonna<\/strong> , poich\u00e9 ha uno 0 e sar\u00e0 quindi pi\u00f9 semplice da risolvere.<\/p>\n<p> Dobbiamo ora <strong>moltiplicare gli elementi della prima colonna per i rispettivi deputati<\/strong> :<\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-277db6b7715c898778f6c5e52d539f70_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\begin{vmatrix} 2 &amp; 3 &amp; 1 \\\\[1.1ex] 0 &amp; -2 &amp; 5 \\\\[1.1ex] 3 &amp; 7 &amp; -4 \\end{vmatrix} \\displaystyle = 2\\bm{\\cdot} \\text{Adj(2)} + 0\\bm{\\cdot} \\text{Adj(0)} + 3 \\bm{\\cdot} \\text{Adj(3)}\" title=\"Rendered by QuickLaTeX.com\" height=\"86\" width=\"358\" style=\"vertical-align: 0px;\"><\/p>\n<\/p>\n<p> Non \u00e8 necessario calcolare il complemento di 0 perch\u00e9 moltiplicandolo per 0 lo annuller\u00e0. Possiamo quindi semplificare:<\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-d0bc46ac6c253597d2de076872399b31_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\displaystyle  = 2\\bm{\\cdot} \\text{Adj(2)} + \\cancel{0\\bm{\\cdot} \\text{Adj(0)}} + 3 \\bm{\\cdot} \\text{Adj(3)}\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"256\" style=\"vertical-align: -5px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-a7c52721ec43ef71d0c163ce48807dec_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\displaystyle = 2\\bm{\\cdot} \\text{Adj(2)}  + 3 \\bm{\\cdot} \\text{Adj(3)}\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"169\" style=\"vertical-align: -5px;\"><\/p>\n<\/p>\n<p> Procediamo ora al <strong>calcolo dei complementi<\/strong> : <\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-dec96b7ca85468ea5e5e4ace37bfc596_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\displaystyle = 2\\cdot (-1)^{1+1} \\cdot \\begin{vmatrix} -2 &amp; 5  \\\\[1.1ex] 7 &amp; -4   \\end{vmatrix}  + 3 \\cdot (-1)^{3+1} \\cdot \\begin{vmatrix} 3 &amp; 1  \\\\[1.1ex] -2 &amp; 5   \\end{vmatrix}\" title=\"Rendered by QuickLaTeX.com\" height=\"54\" width=\"364\" style=\"vertical-align: 0px;\"><\/p>\n<\/p>\n<div style=\"background-color:#fffde7;padding-top: 20px; padding-bottom: 0.5px; padding-right: 40px; padding-left: 30px\" class=\"has-background\">\n<p align=\"LEFT\"> Ricordatevi che per calcolare il <strong>deputato<\/strong><\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-41d4a89db3722950dc94351832a1bcd9_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"a_{ij}\" title=\"Rendered by QuickLaTeX.com\" height=\"14\" width=\"20\" style=\"vertical-align: -6px;\"><\/p>\n<p> , ovvero l&#8217;elemento pubblicitario<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-695d9d59bd04859c6c99e7feb11daab6_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"i\" title=\"Rendered by QuickLaTeX.com\" height=\"12\" width=\"6\" style=\"vertical-align: 0px;\"><\/p>\n<p> e la colonna<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-43c82d5bb00a7568d935a12e3bd969dd_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"j\" title=\"Rendered by QuickLaTeX.com\" height=\"16\" width=\"9\" style=\"vertical-align: -4px;\"><\/p>\n<p> , deve essere applicata la seguente formula:<\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-dcce4b79a3549da03df7c78b678add31_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\text{Adjunto de } a_{ij} = (-1)^{i+j} \\bm{\\cdot} \\text{Menor complementario de } a_{ij}\" title=\"Rendered by QuickLaTeX.com\" height=\"21\" width=\"430\" style=\"vertical-align: -6px;\"><\/p>\n<\/p>\n<p align=\"LEFT\"> dove il minore complementare di<\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-41d4a89db3722950dc94351832a1bcd9_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"a_{ij}\" title=\"Rendered by QuickLaTeX.com\" height=\"14\" width=\"20\" style=\"vertical-align: -6px;\"><\/p>\n<p> \u00e8 il determinante della matrice rimuovendo la riga<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-695d9d59bd04859c6c99e7feb11daab6_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"i\" title=\"Rendered by QuickLaTeX.com\" height=\"12\" width=\"6\" style=\"vertical-align: 0px;\"><\/p>\n<p> e la colonna<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-43c82d5bb00a7568d935a12e3bd969dd_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"j\" title=\"Rendered by QuickLaTeX.com\" height=\"16\" width=\"9\" style=\"vertical-align: -4px;\"><\/p>\n<p> .<\/p>\n<\/div>\n<div class=\"adsb30\" style=\" margin:px; text-align:\"><\/div>\n<p> Risolviamo le potenze e i determinanti:<\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-d445739b9dcbe8e91d0587f6848b4b58_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"= 2 \\cdot 1 \\cdot (8-35) + 3 \\cdot 1 \\cdot \\bigl(15-(-2)\\bigr)\" title=\"Rendered by QuickLaTeX.com\" height=\"22\" width=\"280\" style=\"vertical-align: -7px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-de7e80c3d8d61baaf0c0ee68eb689b18_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"= 2 \\cdot 1 \\cdot (-27) + 3 \\cdot 1 \\cdot 17\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"190\" style=\"vertical-align: -5px;\"><\/p>\n<\/p>\n<p> E operiamo con la calcolatrice:<\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-1db7bb8783ce13a8eb0f765c85a7f268_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"= -54 + 51\" title=\"Rendered by QuickLaTeX.com\" height=\"15\" width=\"89\" style=\"vertical-align: -2px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-784bc17636ee50685733e25452656e2c_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"= \\bm{-3}\" title=\"Rendered by QuickLaTeX.com\" height=\"12\" width=\"42\" style=\"vertical-align: 0px;\"><\/p>\n<\/p>\n<p> Pertanto, <strong>il risultato del determinante \u00e8 -3.<\/strong><\/p>\n<p> Notiamo che se calcoliamo il determinante con la regola di Sarrus, otteniamo lo stesso risultato:<\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-67d7d7936dd26361dcdfda5b28d62ba3_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\begin{aligned} \\begin{vmatrix} 2 &amp; 3 &amp; 1 \\\\[1.1ex] 0 &amp; -2 &amp; 5 \\\\[1.1ex] 3 &amp; 7 &amp; -4   \\end{vmatrix} &amp; = 2 \\cdot (-2) \\cdot (-4) + 3 \\cdot 5 \\cdot  3 +  0 \\cdot 7 \\cdot 1  - 3 \\cdot (-2) \\cdot 1 - 7 \\cdot 5 \\cdot 2- 0 \\cdot 3 \\cdot (-4)  \\\\  &amp; =  16 +45 + 0  +6 - 70 -0   \\\\[2ex] &amp;  =  \\bm{-3}   \\end{aligned}\" title=\"Rendered by QuickLaTeX.com\" height=\"150\" width=\"651\" style=\"vertical-align: 0px;\"><\/p>\n<\/p>\n<p> Una volta che sappiamo come viene calcolato un determinante dai deputati, possiamo ora vedere come trovare il risultato di un determinante di ordine 4:<\/p>\n<h2 class=\"wp-block-heading\"> Come calcolare un determinante 4\u00d74?<\/h2>\n<p class=\"has-background\" style=\"background-color:#dff6ff\"> Per risolvere il <strong>determinante di una matrice di ordine 4<\/strong> dobbiamo applicare il procedimento che abbiamo appena visto per i deputati. Scegliamo cio\u00e8 una riga o una colonna qualsiasi e aggiungiamo i prodotti dei suoi elementi mediante i rispettivi complementi.<\/p>\n<p> Tuttavia, utilizzando questa procedura con un determinante 4 \u00d7 4, \u00e8 necessario calcolare molti determinanti 3 \u00d7 3 e questi tendono a richiedere molto tempo. Pertanto, prima di calcolare gli aggiunti <strong>, vengono eseguite delle trasformazioni sulle linee<\/strong> , simili al metodo gaussiano. Poich\u00e9 una riga di un determinante pu\u00f2 essere sostituita dalla somma della stessa riga pi\u00f9 un&#8217;altra riga moltiplicata per un numero.<\/p>\n<p class=\"has-background\" style=\"background-color:#dff6ff\"> Pertanto, per calcolare un determinante di ordine 4 per deputati, \u00e8 necessario scegliere <strong>la colonna che contiene il maggior numero di zeri<\/strong> , poich\u00e9 ci\u00f2 faciliter\u00e0 i calcoli. E poi eseguiamo operazioni interne sulle righe, in modo che tutti gli elementi nella colonna siano nulli tranne uno.<\/p>\n<p> Vediamo come viene realizzato un determinante 4&#215;4 con un esempio:<\/p>\n<h3 class=\"wp-block-heading\"> Esempio di risoluzione di un determinante 4\u00d74:<\/h3>\n<p> Risolveremo questo determinante della seguente matrice quadrata 4\u00d74:<\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-ababb957a73ca707531ddbd0b18e8c88_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\begin{vmatrix} 1 &amp; 4 &amp; 2 &amp; 1 \\\\[1.1ex] -1 &amp; -1 &amp; 3 &amp; 2 \\\\[1.1ex] 0 &amp; 5 &amp; 7 &amp; -4 \\\\[1.1ex] 2 &amp; 1 &amp; -3 &amp; 2 \\end{vmatrix}\" title=\"Rendered by QuickLaTeX.com\" height=\"108\" width=\"147\" style=\"vertical-align: 0px;\"><\/p>\n<\/p>\n<p> In questo caso, la colonna con il maggior numero di zeri \u00e8 la prima colonna. Pertanto, <strong>scegliamo la prima colonna.<\/strong><\/p>\n<p> E approfittando del fatto che in questa colonna c&#8217;\u00e8 un 1, convertiremo tutti gli altri elementi della prima colonna in 0. Poich\u00e9 \u00e8 pi\u00f9 facile fare i calcoli con la riga che ha un 1.<\/p>\n<p> Pertanto, per trasformare tutti gli altri elementi della colonna in 0, <strong>aggiungiamo la prima riga alla seconda riga<\/strong> e <strong>sottraiamo la prima riga moltiplicata per 2 dalla quarta riga<\/strong> . Non \u00e8 necessario modificare la terza riga perch\u00e9 contiene gi\u00e0 uno 0 nella prima colonna. <\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-6df3837acf7c66f40eb4ce624e7a9417_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\begin{vmatrix} 1 &amp; 4 &amp; 2 &amp; 1 \\\\[1.1ex] -1 &amp; -1 &amp; 3 &amp; 2 \\\\[1.1ex] 0 &amp; 5 &amp; 7 &amp; -4 \\\\[1.1ex] 2 &amp; 1 &amp; -3 &amp; 2 \\end{vmatrix} \\begin{matrix} \\\\[1.1ex] \\xrightarrow{f_2 + f_1}  \\\\[1.1ex]  \\\\[1.1ex] \\xrightarrow{f_4 - 2f_1} \\end{matrix}   \\begin{vmatrix} 1 &amp; 4 &amp; 2 &amp; 1 \\\\[1.1ex] 0 &amp; 3 &amp; 5 &amp; 3 \\\\[1.1ex] 0 &amp; 5 &amp; 7 &amp; -4 \\\\[1.1ex] 0 &amp; -7 &amp; -7 &amp; 0 \\end{vmatrix}\" title=\"Rendered by QuickLaTeX.com\" height=\"111\" width=\"351\" style=\"vertical-align: 0px;\"><\/p>\n<\/p>\n<div class=\"adsb30\" style=\" margin:12px; text-align:center\">\n<div id=\"ezoic-pub-ad-placeholder-118\"><\/div>\n<\/div>\n<p> Dopo aver convertito in 0 tutti gli elementi tranne uno nella colonna scelta, calcoliamo il determinante per deputati. Vale a dire <strong>, aggiungiamo i prodotti degli elementi della colonna secondo i rispettivi sostituti:<\/strong><\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-0c3bad793847458372f7af88f98a921d_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\begin{vmatrix} 1 &amp; 4 &amp; 2 &amp; 1 \\\\[1.1ex] 0 &amp; 3 &amp; 5 &amp; 3 \\\\[1.1ex] 0 &amp; 5 &amp; 7 &amp; -4 \\\\[1.1ex] 0 &amp; -7 &amp; -7 &amp; 0 \\end{vmatrix} \\displaystyle = 1\\bm{\\cdot} \\text{Adj(1)} + 0\\bm{\\cdot} \\text{Adj(0)} +0\\bm{\\cdot} \\text{Adj(0)} + 0\\bm{\\cdot} \\text{Adj(0)}\" title=\"Rendered by QuickLaTeX.com\" height=\"108\" width=\"484\" style=\"vertical-align: 0px;\"><\/p>\n<\/p>\n<p> I termini moltiplicati per 0 si annullano, quindi li semplifichiamo: <\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-2239b8f823620f93d1b5f1379434dc99_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"=1\\bm{\\cdot} \\text{Adj(1)} + \\cancel{0\\bm{\\cdot} \\text{Adj(0)}} +\\cancel{0\\bm{\\cdot} \\text{Adj(0)}} + \\cancel{0\\bm{\\cdot} \\text{Adj(0)}}\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"343\" style=\"vertical-align: -5px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-b2a34a2dd540c8b59c0219616d77503e_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"=1\\bm{\\cdot} \\text{Adj(1)}\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"83\" style=\"vertical-align: -5px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-82725740cf1ab8626df8c97a23ac9b3e_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"=\\text{Adj(1)}\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"69\" style=\"vertical-align: -5px;\"><\/p>\n<\/p>\n<p> \u00c8 quindi sufficiente calcolare l&#8217;aggiunto di 1:<\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-e7a9b3d371059e3c485bde74c0a3ca9e_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\displaystyle = (-1)^{1+1} \\cdot \\begin{vmatrix}  3 &amp; 5 &amp; 3 \\\\[1.1ex] 5 &amp; 7 &amp; -4 \\\\[1.1ex] -7 &amp; -7 &amp; 0   \\end{vmatrix}\" title=\"Rendered by QuickLaTeX.com\" height=\"86\" width=\"203\" style=\"vertical-align: 0px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-left\"> Calcoliamo il determinante con la regola di Sarrus e la potenza: <\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-93f12fd53bc084017d9148e07b836911_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\inlinestyle = 1 \\cdot \\bigl[  3 \\cdot 7 \\cdot 0 + 5 \\cdot (-4) \\cdot (-7) + 5 \\cdot (-7)  \\cdot 3 - (-7)\\cdot 7 \\cdot 3 - (-7) \\cdot (-4) \\cdot 3 - 5 \\cdot 5 \\cdot 0 \\bigr]\" title=\"Rendered by QuickLaTeX.com\" height=\"22\" width=\"639\" style=\"vertical-align: -7px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-7d0573ada70206ddd4354f35b2d835e1_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"=3 \\cdot 7 \\cdot 0 + 5 \\cdot (-4) \\cdot (-7) + 5 \\cdot (-7)  \\cdot 3 - (-7)\\cdot 7 \\cdot 3 - (-7) \\cdot (-4) \\cdot 3 - 5 \\cdot 5 \\cdot 0\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"606\" style=\"vertical-align: -5px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-left\"> E infine risolviamo le operazioni con la calcolatrice: <\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-1b1d16c734194e3d70848c9c2a0e3267_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\displaystyle =0+140-105 +147 - 84 - 0\" title=\"Rendered by QuickLaTeX.com\" height=\"15\" width=\"242\" style=\"vertical-align: -2px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-1824a37e33693e87497735175f429f1e_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\displaystyle =\\bm{98}\" title=\"Rendered by QuickLaTeX.com\" height=\"12\" width=\"37\" style=\"vertical-align: 0px;\"><\/p>\n<\/p>\n<h2 class=\"wp-block-heading\"> Esercizi risolti sui determinanti 4\u00d74<\/h2>\n<h3 class=\"wp-block-heading\"> Esercizio 1<\/h3>\n<p> Risolvi il seguente determinante di ordine 4: <\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-eb70dab3d17f588315c49d05c112259a_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\displaystyle \\begin{pmatrix} 2 &amp; 3 &amp; -1 &amp; 0 \\\\[1.1ex] 0 &amp; 1 &amp; 1 &amp; 1 \\\\[1.1ex] 2 &amp; 3 &amp; 1 &amp; -1 \\\\[1.1ex] 4 &amp; 1 &amp; 2 &amp; 0 \\end{pmatrix}\" title=\"Rendered by QuickLaTeX.com\" height=\"107\" width=\"133\" style=\"vertical-align: 0px;\"><\/p>\n<\/p>\n<div class=\"wp-block-otfm-box-spoiler-start otfm-sp__wrapper otfm-sp__box js-otfm-sp-box__closed otfm-sp__E3F2FD boto_ver_solucion\" role=\"button\" tabindex=\"0\" aria-expanded=\"false\" data-otfm-spc=\"#E3F2FD\" style=\"text-align:center\">\n<div class=\"otfm-sp__title\"> <strong>vedi soluzione<\/strong><\/div>\n<\/div>\n<p class=\"has-text-align-left\"> Troveremo il risultato del determinante 4\u00d74 con il metodo dei cofattori. Ma prima facciamo delle operazioni con le righe per azzerare tutti gli elementi di una colonna tranne uno:<\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-8c809d42e17e7e1ee0332b61c1d73d2e_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\begin{vmatrix} 2 &amp; 3 &amp; -1 &amp; 0 \\\\[1.1ex] 0 &amp; 1 &amp; 1 &amp; 1 \\\\[1.1ex] 2 &amp; 3 &amp; 1 &amp; -1 \\\\[1.1ex] 4 &amp; 1 &amp; 2 &amp; 0 \\end{vmatrix} \\begin{matrix} \\\\[1.1ex] \\\\[1.1ex] \\xrightarrow{f_3 + f_2}  \\\\[1.1ex] \\  \\end{matrix} \\begin{vmatrix} 2 &amp; 3 &amp; -1 &amp; 0 \\\\[1.1ex] 0 &amp; 1 &amp; 1 &amp; 1 \\\\[1.1ex] 2 &amp; 4 &amp; 2 &amp; 0 \\\\[1.1ex] 4 &amp; 1 &amp; 2 &amp; 0 \\end{vmatrix}\" title=\"Rendered by QuickLaTeX.com\" height=\"107\" width=\"289\" style=\"vertical-align: 0px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-left\"> E ora risolviamo il determinante 4\u00d74 con gli aggiunti con l&#8217;ultima colonna:<\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-4c615be7d70d93645d25c2ddaa0ac6aa_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\begin{vmatrix} 2 &amp; 3 &amp; -1 &amp; 0 \\\\[1.1ex] 0 &amp; 1 &amp; 1 &amp; 1 \\\\[1.1ex] 2 &amp; 4 &amp; 2 &amp; 0 \\\\[1.1ex] 4 &amp; 1 &amp; 2 &amp; 0 \\end{vmatrix} = 0\\bm{\\cdot} \\text{Adj(0)} +1\\bm{\\cdot} \\text{Adj(1)} +0\\bm{\\cdot} \\text{Adj(0)} + 0\\bm{\\cdot} \\text{Adj(0)}\" title=\"Rendered by QuickLaTeX.com\" height=\"108\" width=\"457\" style=\"vertical-align: 0px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-left\"> Semplifichiamo i termini: <\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-dd6256c60b3b6c80618d045fe7c5d5aa_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"= \\cancel{0\\bm{\\cdot} \\text{Adj(0)}} +1\\bm{\\cdot} \\text{Adj(1)} +\\cancel{0\\bm{\\cdot} \\text{Adj(0)}} + \\cancel{0\\bm{\\cdot} \\text{Adj(0)}}\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"343\" style=\"vertical-align: -5px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-029594698d2ffb9e165ed06c51bd495e_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"= \\text{Adj(1)}\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"69\" style=\"vertical-align: -5px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-left\"> Calcoliamo l&#8217;aggiunto di 1:<\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-50df3a50bef626dd5e03150e1b72f005_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\displaystyle = (-1)^{2+4} \\cdot \\begin{vmatrix} 2 &amp; 3 &amp; -1 \\\\[1.1ex] 2 &amp; 4 &amp; 2 \\\\[1.1ex]4 &amp; 1 &amp; 2 \\end{vmatrix}\" title=\"Rendered by QuickLaTeX.com\" height=\"86\" width=\"176\" style=\"vertical-align: 0px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-left\"> E, infine, calcoliamo il determinante 3\u00d73 con la regola di Sarrus: <\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-763a4951c54ea0c5f771511b8f9352b9_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\displaystyle = (-1)^{6} \\cdot \\bigl[16+24-2+16-4-12 \\bigr]\" title=\"Rendered by QuickLaTeX.com\" height=\"23\" width=\"284\" style=\"vertical-align: -7px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-b43ce8127960f80ab1bd12ceade45a15_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\displaystyle = 1 \\cdot \\bigl[38 \\bigr]\" title=\"Rendered by QuickLaTeX.com\" height=\"22\" width=\"70\" style=\"vertical-align: -7px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-dbd344edf36713829b1e6d27c291c358_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\displaystyle = \\bm{38}\" title=\"Rendered by QuickLaTeX.com\" height=\"12\" width=\"37\" style=\"vertical-align: 0px;\"><\/p>\n<\/p>\n<div class=\"wp-block-otfm-box-spoiler-end otfm-sp_end\"><\/div>\n<h3 class=\"wp-block-heading\">Esercizio 2<\/h3>\n<p> Calcolare il seguente determinante di ordine 4: <\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-75fcf71d7c2badd23fe9196996dd87b9_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\displaystyle \\begin{pmatrix} 1 &amp; 3 &amp; -2 &amp; 2 \\\\[1.1ex] 2 &amp; 0 &amp; 1 &amp; 4 \\\\[1.1ex] 1 &amp; 1 &amp; 2 &amp; 3 \\\\[1.1ex] 5 &amp; -1 &amp; 3 &amp; 1 \\end{pmatrix}\" title=\"Rendered by QuickLaTeX.com\" height=\"107\" width=\"133\" style=\"vertical-align: 0px;\"><\/p>\n<\/p>\n<div class=\"wp-block-otfm-box-spoiler-start otfm-sp__wrapper otfm-sp__box js-otfm-sp-box__closed otfm-sp__E3F2FD boto_ver_solucion\" role=\"button\" tabindex=\"0\" aria-expanded=\"false\" data-otfm-spc=\"#E3F2FD\" style=\"text-align:center\">\n<div class=\"otfm-sp__title\"> <strong>vedi soluzione<\/strong><\/div>\n<\/div>\n<p class=\"has-text-align-left\"> Calcoleremo il determinante 4\u00d74 in base ai cofattori. Ma per fare ci\u00f2, eseguiamo prima delle operazioni con le righe per impostare a zero tutti gli elementi di una colonna tranne uno:<\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-ede833746cd2f0d82603b38b58dc4aa5_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\begin{vmatrix} 1 &amp; 3 &amp; -2 &amp; 2 \\\\[1.1ex] 2 &amp; 0 &amp; 1 &amp; 4 \\\\[1.1ex] 1 &amp; 1 &amp; 2 &amp; 3 \\\\[1.1ex] 5 &amp; -1 &amp; 3 &amp; 1 \\end{vmatrix} \\begin{matrix} \\xrightarrow{f_1 - 3f_3} \\\\[1.1ex] \\\\[1.1ex] \\\\[1.1ex] \\xrightarrow{f_4 + f_3}  \\end{matrix} \\begin{vmatrix}-2 &amp; 0 &amp; -8 &amp; -7 \\\\[1.1ex] 2 &amp; 0 &amp; 1 &amp; 4 \\\\[1.1ex] 1 &amp; 1 &amp; 2 &amp; 3 \\\\[1.1ex] 6 &amp; 0 &amp; 5 &amp; 4 \\end{vmatrix}\" title=\"Rendered by QuickLaTeX.com\" height=\"118\" width=\"323\" style=\"vertical-align: 0px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-left\"> Ora risolviamo il determinante 4\u00d74 con gli aggiunti con la seconda colonna:<\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-399eaa68014d6ebedb35770b1a1faa93_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\begin{vmatrix} -2 &amp; 0 &amp; -8 &amp; -7 \\\\[1.1ex] 2 &amp; 0 &amp; 1 &amp; 4 \\\\[1.1ex] 1 &amp; 1 &amp; 2 &amp; 3 \\\\[1.1ex] 6 &amp; 0 &amp; 5 &amp; 4\\end{vmatrix} = 0\\bm{\\cdot} \\text{Adj(0)} +0\\bm{\\cdot} \\text{Adj(0)} +1\\bm{\\cdot} \\text{Adj(1)}+ 0\\bm{\\cdot} \\text{Adj(0)}\" title=\"Rendered by QuickLaTeX.com\" height=\"108\" width=\"485\" style=\"vertical-align: 0px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-left\"> Semplifichiamo i termini: <\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-b974efd2413b220e574aa45de9e8da20_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"= \\cancel{0\\bm{\\cdot} \\text{Adj(0)}} +\\cancel{0\\bm{\\cdot} \\text{Adj(0)}} +1\\bm{\\cdot} \\text{Adj(1)}+\\cancel{0\\bm{\\cdot} \\text{Adj(0)}}\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"343\" style=\"vertical-align: -5px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-029594698d2ffb9e165ed06c51bd495e_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"= \\text{Adj(1)}\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"69\" style=\"vertical-align: -5px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-left\"> Calcoliamo l&#8217;aggiunto di 1:<\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-599484242287cf94fb222cb16fb92131_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\displaystyle = (-1)^{3+2} \\begin{vmatrix}-2 &amp; -8 &amp; -7 \\\\[1.1ex] 2 &amp; 1 &amp; 4 \\\\[1.1ex] 6 &amp; 5 &amp; 4\\end{vmatrix}\" title=\"Rendered by QuickLaTeX.com\" height=\"86\" width=\"194\" style=\"vertical-align: 0px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-left\"> E, infine, calcoliamo il determinante 3\u00d73 con la regola di Sarrus e la calcolatrice: <\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-b49d5a07a376cb7c236daea3910053dc_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\displaystyle = (-1)^{5} \\cdot \\bigl[-8-192-70+42+40+64 \\bigr]\" title=\"Rendered by QuickLaTeX.com\" height=\"23\" width=\"316\" style=\"vertical-align: -7px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-647420e9c51528a2b7d9e5d7ab9d9c9f_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\displaystyle = -1 \\cdot \\bigl[-124 \\bigr]\" title=\"Rendered by QuickLaTeX.com\" height=\"22\" width=\"107\" style=\"vertical-align: -7px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-7de3e73e3809178c7ade54977ff42f5f_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\displaystyle = \\bm{124}\" title=\"Rendered by QuickLaTeX.com\" height=\"12\" width=\"46\" style=\"vertical-align: 0px;\"><\/p>\n<\/p>\n<div class=\"wp-block-otfm-box-spoiler-end otfm-sp_end\"><\/div>\n<div class=\"adsb30\" style=\" margin:12px; text-align:center\">\n<div id=\"ezoic-pub-ad-placeholder-119\"><\/div>\n<\/div>\n<h3 class=\"wp-block-heading\"> Esercizio 3<\/h3>\n<p> Trovare il risultato del seguente determinante di ordine 4: <\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-73122188e3bb7cb74e2f0c668fa2121f_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\displaystyle \\begin{pmatrix} 2 &amp; -2 &amp; -1 &amp; 3 \\\\[1.1ex] 4 &amp; 3 &amp; 1 &amp; -2 \\\\[1.1ex] -1 &amp; 2 &amp; 1 &amp; -1 \\\\[1.1ex] 3 &amp; -2 &amp; -4 &amp; 5 \\end{pmatrix}\" title=\"Rendered by QuickLaTeX.com\" height=\"107\" width=\"161\" style=\"vertical-align: 0px;\"><\/p>\n<\/p>\n<div class=\"wp-block-otfm-box-spoiler-start otfm-sp__wrapper otfm-sp__box js-otfm-sp-box__closed otfm-sp__E3F2FD boto_ver_solucion\" role=\"button\" tabindex=\"0\" aria-expanded=\"false\" data-otfm-spc=\"#E3F2FD\" style=\"text-align:center\">\n<div class=\"otfm-sp__title\"> <strong>vedi soluzione<\/strong><\/div>\n<\/div>\n<p class=\"has-text-align-left\"> Risolveremo il determinante 4\u00d74 dai deputati. Sebbene prima eseguiamo operazioni con le righe per convertire in zero tutti gli elementi tranne uno in una colonna:<\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-09884ca951854a78be30a1ab22ada92b_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\begin{vmatrix}2 &amp; -2 &amp; -1 &amp; 3 \\\\[1.1ex] 4 &amp; 3 &amp; 1 &amp; -2 \\\\[1.1ex] -1 &amp; 2 &amp; 1 &amp; -1 \\\\[1.1ex] 3 &amp; -2 &amp; -4 &amp; 5 \\end{vmatrix} \\begin{matrix} \\xrightarrow{f_1 + f_2} \\\\[1.1ex] \\\\[1.1ex]\\xrightarrow{f_3 - f_2} \\\\[1.1ex] \\xrightarrow{f_4 + 4f_2}  \\end{matrix} \\begin{vmatrix}6 &amp; 1 &amp; 0 &amp; 1 \\\\[1.1ex] 4 &amp; 3 &amp; 1 &amp; -2 \\\\[1.1ex] -5 &amp; -1 &amp; 0 &amp; 1 \\\\[1.1ex] 19 &amp; 10 &amp; 0 &amp; -3 \\end{vmatrix}\" title=\"Rendered by QuickLaTeX.com\" height=\"125\" width=\"351\" style=\"vertical-align: 0px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-left\"> Ora risolviamo il determinante 4\u00d74 deputati con la terza colonna:<\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-025c7fdc16e4c1d95e77203464404bf3_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\begin{vmatrix}6 &amp; 1 &amp; 0 &amp; 1 \\\\[1.1ex] 4 &amp; 3 &amp; 1 &amp; -2 \\\\[1.1ex] -5 &amp; -1 &amp; 0 &amp; 1 \\\\[1.1ex] 19 &amp; 10 &amp; 0 &amp; -3 \\end{vmatrix}  = 0\\bm{\\cdot} \\text{Adj(0)} +1\\bm{\\cdot} \\text{Adj(1)} +0\\bm{\\cdot} \\text{Adj(0)}+ 0\\bm{\\cdot} \\text{Adj(0)}\" title=\"Rendered by QuickLaTeX.com\" height=\"108\" width=\"485\" style=\"vertical-align: 0px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-left\"> Semplifichiamo i termini: <\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-3acde32d0408398738d704722018fb9c_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"= \\cancel{0\\bm{\\cdot}+ \\text{Adj(0)}} +1\\bm{\\cdot} \\text{Adj(1)}+\\cancel{0\\bm{\\cdot} \\text{Adj(0)}} +\\cancel{0\\bm{\\cdot} \\text{Adj(0)}}\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"364\" style=\"vertical-align: -5px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-029594698d2ffb9e165ed06c51bd495e_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"= \\text{Adj(1)}\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"69\" style=\"vertical-align: -5px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-left\"> Calcoliamo l&#8217;aggiunto di 1:<\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-b919673f5add2981d4170b0aea65735e_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\displaystyle = (-1)^{2+3} \\begin{vmatrix}6 &amp; 1 &amp; 1 \\\\[1.1ex] -5 &amp; -1 &amp; 1 \\\\[1.1ex] 19 &amp; 10 &amp; -3\\end{vmatrix}\" title=\"Rendered by QuickLaTeX.com\" height=\"86\" width=\"194\" style=\"vertical-align: 0px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-left\"> E infine risolviamo il determinante 3\u00d73 con la regola di Sarrus e la calcolatrice: <\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-a9985880705b7ca57fbafd39d9d8ffb7_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\displaystyle = (-1)^{5} \\cdot \\bigl[18+19-50+19-60-15\\bigr]\" title=\"Rendered by QuickLaTeX.com\" height=\"23\" width=\"302\" style=\"vertical-align: -7px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-4cb59f26a6ada4b6c25bf7036a43307e_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\displaystyle = -1 \\cdot \\bigl[-69 \\bigr]\" title=\"Rendered by QuickLaTeX.com\" height=\"22\" width=\"98\" style=\"vertical-align: -7px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-36f353d56aed6ff4825e8ccaf3d1e3cc_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\displaystyle = \\bm{69}\" title=\"Rendered by QuickLaTeX.com\" height=\"12\" width=\"37\" style=\"vertical-align: 0px;\"><\/p>\n<\/p>\n<div class=\"wp-block-otfm-box-spoiler-end otfm-sp_end\"><\/div>\n<h3 class=\"wp-block-heading\">Esercizio 4<\/h3>\n<p> Calcolare il risultato del seguente determinante di ordine 4: <\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-c97cbbc8f7ec94839181ffee815e4cc5_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\displaystyle \\begin{pmatrix} 3 &amp; 4 &amp; -2 &amp; -1 \\\\[1.1ex] 2 &amp; -2 &amp; 5 &amp; -5 \\\\[1.1ex] -3 &amp; 5 &amp; 2 &amp; 6 \\\\[1.1ex] -1 &amp; -2 &amp; -1 &amp; 3 \\end{pmatrix}\" title=\"Rendered by QuickLaTeX.com\" height=\"107\" width=\"161\" style=\"vertical-align: 0px;\"><\/p>\n<\/p>\n<div class=\"wp-block-otfm-box-spoiler-start otfm-sp__wrapper otfm-sp__box js-otfm-sp-box__closed otfm-sp__E3F2FD boto_ver_solucion\" role=\"button\" tabindex=\"0\" aria-expanded=\"false\" data-otfm-spc=\"#E3F2FD\" style=\"text-align:center\">\n<div class=\"otfm-sp__title\"> <strong>vedi soluzione<\/strong><\/div>\n<\/div>\n<p class=\"has-text-align-left\"> Risolveremo il determinante 4\u00d74 utilizzando la regola di Laplace. Ma devi prima eseguire operazioni con le righe per impostare a zero tutti gli elementi di una colonna tranne uno:<\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-f7f8b52a83480123b6b7dd2dbb8e4eed_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\begin{vmatrix}3 &amp; 4 &amp; -2 &amp; -1 \\\\[1.1ex] 2 &amp; -2 &amp; 5 &amp; -5 \\\\[1.1ex] -3 &amp; 5 &amp; 2 &amp; 6 \\\\[1.1ex] -1 &amp; -2 &amp; -1 &amp; 3\\end{vmatrix} \\begin{matrix} \\xrightarrow{f_1 + 3f_4} \\\\[1.1ex] \\xrightarrow{f_2 +2f_4} \\\\[1.1ex]\\xrightarrow{f_3 - 3f_4} \\\\[1.1ex] \\  \\end{matrix} \\begin{vmatrix}0 &amp; -2 &amp; -5 &amp; 8 \\\\[1.1ex]0 &amp; -6 &amp; 3 &amp; 1 \\\\[1.1ex] 0 &amp; 11 &amp; 5 &amp; -3 \\\\[1.1ex] -1 &amp; -2 &amp; -1 &amp; 3\\end{vmatrix}\" title=\"Rendered by QuickLaTeX.com\" height=\"118\" width=\"365\" style=\"vertical-align: 0px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-left\"> Adesso risolviamo per deputati il determinante 4\u00d74 con la prima colonna:<\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-18bb3f7dbb81eb9cc025112114d11ce0_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\begin{vmatrix}0 &amp; -2 &amp; -5 &amp; 8 \\\\[1.1ex]0 &amp; -6 &amp; 3 &amp; 1 \\\\[1.1ex] 0 &amp; 11 &amp; 5 &amp; -3 \\\\[1.1ex] -1 &amp; -2 &amp; -1 &amp; 3 \\end{vmatrix}  = 0\\bm{\\cdot} \\text{Adj(0)} +0\\bm{\\cdot} \\text{Adj(0)} + 0\\bm{\\cdot} \\text{Adj(0)}-1\\bm{\\cdot} \\text{Adj(-1)}\" title=\"Rendered by QuickLaTeX.com\" height=\"108\" width=\"504\" style=\"vertical-align: 0px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-left\"> Semplifichiamo i termini: <\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-6ac1edf725b65caef7eb39145aea4933_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"= \\cancel{0\\bm{\\cdot} \\text{Adj(0)}} +\\cancel{0\\bm{\\cdot} \\text{Adj(0)}} +\\cancel{0\\bm{\\cdot} \\text{Adj(0)}}-1\\bm{\\cdot} \\text{Adj(-1)}\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"349\" style=\"vertical-align: -5px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-bfef84c16e45679b2b46f1f8913f38e1_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"=- \\text{Adj(-1)}\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"89\" style=\"vertical-align: -5px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-left\"> Calcoliamo l&#8217;aggiunto di -1:<\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-e490606c22340f1f9cd1113227e5ff09_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\displaystyle =- (-1)^{4+1} \\begin{vmatrix} -2 &amp; -5 &amp; 8 \\\\[1.1ex]-6 &amp; 3 &amp; 1 \\\\[1.1ex] 11 &amp; 5 &amp; -3 \\end{vmatrix}\" title=\"Rendered by QuickLaTeX.com\" height=\"86\" width=\"207\" style=\"vertical-align: 0px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-left\"> E infine risolviamo il determinante 3\u00d73 con la regola di Sarrus e la calcolatrice: <\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-00cb04c5cac0d36fdc9d350d35d03147_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\displaystyle = -(-1)^{5} \\cdot \\bigl[18-55-240-264+10+90\\bigr]\" title=\"Rendered by QuickLaTeX.com\" height=\"23\" width=\"334\" style=\"vertical-align: -7px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-40374b9fedd37c8b42c0c0661da29e40_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\displaystyle = -(-1) \\cdot \\bigl[-441 \\bigr]\" title=\"Rendered by QuickLaTeX.com\" height=\"22\" width=\"134\" style=\"vertical-align: -7px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-edeeb7ad0e18ba2edb7f7163fb390155_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\displaystyle = - \\bigl[+441 \\bigr]\" title=\"Rendered by QuickLaTeX.com\" height=\"22\" width=\"85\" style=\"vertical-align: -7px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-7a41b8d5835f4f5c96395cf976d30b8c_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\displaystyle = \\bm{-441}\" title=\"Rendered by QuickLaTeX.com\" height=\"12\" width=\"59\" style=\"vertical-align: 0px;\"><\/p>\n<\/p>\n<div class=\"wp-block-otfm-box-spoiler-end otfm-sp_end\"><\/div>\n<p> Con tutta questa pratica, probabilmente saprai gi\u00e0 come risolvere i determinanti 4&#215;4. Fantastico! Ci auguriamo che con tutti questi esercizi ora sarai in grado di calcolare la <a href=\"https:\/\/mathority.org\/it\/rango-di-una-matrice\/\">portata di una matrice di dimensione 4\u00d74<\/a> che costa cos\u00ec tante persone.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In questa pagina vedremo come risolvere un determinante mediante addizioni o cofattori e anche come calcolare il determinante di una matrice di dimensione 4\u00d74 . Tuttavia, per risolvere il determinante di una matrice di ordine 4, devi prima sapere come calcolare un determinante utilizzando gli aggiunti di una riga o di una colonna. Vedremo quindi &hellip;<\/p>\n<p class=\"read-more\"> <a class=\"\" href=\"https:\/\/mathority.org\/it\/determinanti-4x4-con-esempi-complementari-ed-esercizi-risolti\/\"> <span class=\"screen-reader-text\">Come calcolare il determinante di una matrice 4&#215;4 mediante complementi o cofattori<\/span> Leggi altro &raquo;<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"","footnotes":""},"categories":[7],"tags":[],"class_list":["post-293","post","type-post","status-publish","format-standard","hentry","category-determinante-di-una-matrice"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.2 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Come calcolare il determinante di una matrice 4\u00d74 mediante complementi o cofattori - Mathority<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/mathority.org\/it\/determinanti-4x4-con-esempi-complementari-ed-esercizi-risolti\/\" \/>\n<meta property=\"og:locale\" content=\"it_IT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Come calcolare il determinante di una matrice 4\u00d74 mediante complementi o cofattori - Mathority\" \/>\n<meta property=\"og:description\" content=\"In questa pagina vedremo come risolvere un determinante mediante addizioni o cofattori e anche come calcolare il determinante di una matrice di dimensione 4\u00d74 . Tuttavia, per risolvere il determinante di una matrice di ordine 4, devi prima sapere come calcolare un determinante utilizzando gli aggiunti di una riga o di una colonna. Vedremo quindi &hellip; Come calcolare il determinante di una matrice 4&#215;4 mediante complementi o cofattori Leggi altro &raquo;\" \/>\n<meta property=\"og:url\" content=\"https:\/\/mathority.org\/it\/determinanti-4x4-con-esempi-complementari-ed-esercizi-risolti\/\" \/>\n<meta property=\"article:published_time\" content=\"2023-07-06T18:52:35+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-1feaff2f490e464eb2de796be2d7feaf_l3.png\" \/>\n<meta name=\"author\" content=\"Squadra di Mathority\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Scritto da\" \/>\n\t<meta name=\"twitter:data1\" content=\"Squadra di Mathority\" \/>\n\t<meta name=\"twitter:label2\" content=\"Tempo di lettura stimato\" \/>\n\t<meta name=\"twitter:data2\" content=\"5 minuti\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/mathority.org\/it\/determinanti-4x4-con-esempi-complementari-ed-esercizi-risolti\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/mathority.org\/it\/determinanti-4x4-con-esempi-complementari-ed-esercizi-risolti\/\"},\"author\":{\"name\":\"Squadra di Mathority\",\"@id\":\"https:\/\/mathority.org\/it\/#\/schema\/person\/8d6f69ffbe48aea8b43675a9a3ddb9c8\"},\"headline\":\"Come calcolare il determinante di una matrice 4&#215;4 mediante complementi o cofattori\",\"datePublished\":\"2023-07-06T18:52:35+00:00\",\"dateModified\":\"2023-07-06T18:52:35+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/mathority.org\/it\/determinanti-4x4-con-esempi-complementari-ed-esercizi-risolti\/\"},\"wordCount\":948,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/mathority.org\/it\/#organization\"},\"articleSection\":[\"Determinante di una matrice\"],\"inLanguage\":\"it-IT\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/mathority.org\/it\/determinanti-4x4-con-esempi-complementari-ed-esercizi-risolti\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/mathority.org\/it\/determinanti-4x4-con-esempi-complementari-ed-esercizi-risolti\/\",\"url\":\"https:\/\/mathority.org\/it\/determinanti-4x4-con-esempi-complementari-ed-esercizi-risolti\/\",\"name\":\"Come calcolare il determinante di una matrice 4\u00d74 mediante complementi o cofattori - 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Mathority","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/mathority.org\/it\/determinanti-4x4-con-esempi-complementari-ed-esercizi-risolti\/","og_locale":"it_IT","og_type":"article","og_title":"Come calcolare il determinante di una matrice 4\u00d74 mediante complementi o cofattori - Mathority","og_description":"In questa pagina vedremo come risolvere un determinante mediante addizioni o cofattori e anche come calcolare il determinante di una matrice di dimensione 4\u00d74 . Tuttavia, per risolvere il determinante di una matrice di ordine 4, devi prima sapere come calcolare un determinante utilizzando gli aggiunti di una riga o di una colonna. Vedremo quindi &hellip; Come calcolare il determinante di una matrice 4&#215;4 mediante complementi o cofattori Leggi altro &raquo;","og_url":"https:\/\/mathority.org\/it\/determinanti-4x4-con-esempi-complementari-ed-esercizi-risolti\/","article_published_time":"2023-07-06T18:52:35+00:00","og_image":[{"url":"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-1feaff2f490e464eb2de796be2d7feaf_l3.png"}],"author":"Squadra di Mathority","twitter_card":"summary_large_image","twitter_misc":{"Scritto da":"Squadra di Mathority","Tempo di lettura stimato":"5 minuti"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/mathority.org\/it\/determinanti-4x4-con-esempi-complementari-ed-esercizi-risolti\/#article","isPartOf":{"@id":"https:\/\/mathority.org\/it\/determinanti-4x4-con-esempi-complementari-ed-esercizi-risolti\/"},"author":{"name":"Squadra di Mathority","@id":"https:\/\/mathority.org\/it\/#\/schema\/person\/8d6f69ffbe48aea8b43675a9a3ddb9c8"},"headline":"Come calcolare il determinante di una matrice 4&#215;4 mediante complementi o cofattori","datePublished":"2023-07-06T18:52:35+00:00","dateModified":"2023-07-06T18:52:35+00:00","mainEntityOfPage":{"@id":"https:\/\/mathority.org\/it\/determinanti-4x4-con-esempi-complementari-ed-esercizi-risolti\/"},"wordCount":948,"commentCount":0,"publisher":{"@id":"https:\/\/mathority.org\/it\/#organization"},"articleSection":["Determinante di una matrice"],"inLanguage":"it-IT","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/mathority.org\/it\/determinanti-4x4-con-esempi-complementari-ed-esercizi-risolti\/#respond"]}]},{"@type":"WebPage","@id":"https:\/\/mathority.org\/it\/determinanti-4x4-con-esempi-complementari-ed-esercizi-risolti\/","url":"https:\/\/mathority.org\/it\/determinanti-4x4-con-esempi-complementari-ed-esercizi-risolti\/","name":"Come calcolare il determinante di una matrice 4\u00d74 mediante complementi o cofattori - 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