{"id":12,"date":"2023-09-17T11:12:19","date_gmt":"2023-09-17T11:12:19","guid":{"rendered":"https:\/\/mathority.org\/ja\/%e9%96%a2%e6%95%b0%e3%81%a8-xy-%e8%bb%b8%e3%82%b0%e3%83%a9%e3%83%95%e3%81%ae%e3%82%ab%e3%83%83%e3%83%88%e3%82%aa%e3%83%95%e3%81%be%e3%81%9f%e3%81%af%e4%ba%a4%e7%82%b9\/"},"modified":"2023-09-17T11:12:19","modified_gmt":"2023-09-17T11:12:19","slug":"%e9%96%a2%e6%95%b0%e3%81%a8-xy-%e8%bb%b8%e3%82%b0%e3%83%a9%e3%83%95%e3%81%ae%e3%82%ab%e3%83%83%e3%83%88%e3%82%aa%e3%83%95%e3%81%be%e3%81%9f%e3%81%af%e4%ba%a4%e7%82%b9","status":"publish","type":"post","link":"https:\/\/mathority.org\/ja\/%e9%96%a2%e6%95%b0%e3%81%a8-xy-%e8%bb%b8%e3%82%b0%e3%83%a9%e3%83%95%e3%81%ae%e3%82%ab%e3%83%83%e3%83%88%e3%82%aa%e3%83%95%e3%81%be%e3%81%9f%e3%81%af%e4%ba%a4%e7%82%b9\/","title":{"rendered":"\u95a2\u6570\u3068\u8ef8\u306e\u5207\u65ad\u70b9\u307e\u305f\u306f\u4ea4\u70b9"},"content":{"rendered":"<p>\u3053\u306e\u30da\u30fc\u30b8\u3067\u306f\u3001\u95a2\u6570\u3068\u30c7\u30ab\u30eb\u30c8\u8ef8\u306e\u4ea4\u70b9 (\u307e\u305f\u306f\u4ea4\u5dee) \u3068\u306f\u4f55\u304b\u3001\u304a\u3088\u3073\u305d\u306e\u8a08\u7b97\u65b9\u6cd5\u306b\u3064\u3044\u3066\u8aac\u660e\u3057\u307e\u3059\u3002\u3055\u3089\u306b\u3001\u305d\u308c\u3089\u304c\u3069\u306e\u3088\u3046\u306b\u898b\u3064\u3051\u3089\u308c\u308b\u304b\u3092\u5b8c\u5168\u306b\u7406\u89e3\u3059\u308b\u305f\u3081\u306e\u3044\u304f\u3064\u304b\u306e\u4f8b\u304c\u3042\u308a\u3001\u6bb5\u968e\u7684\u306b\u89e3\u6c7a\u3055\u308c\u305f\u6f14\u7fd2\u3067\u7df4\u7fd2\u3059\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002 <\/p>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%c2%bfque-son-los-puntos-de-corte-o-interseccion-de-una-funcion-con-los-ejes\"><\/span>\u95a2\u6570\u3068\u8ef8\u306e\u4ea4\u70b9 (\u307e\u305f\u306f\u4ea4\u70b9) \u306f\u4f55\u3067\u3059\u304b?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u8a08\u7b97\u65b9\u6cd5\u3092\u78ba\u8a8d\u3059\u308b\u524d\u306b\u3001\u95a2\u6570\u3068\u8ef8\u306e\u4ea4\u70b9\u304c\u4f55\u3067\u3042\u308b\u304b\u3092\u899a\u3048\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n<p><strong>\u4ea4\u5dee\u307e\u305f\u306f\u8ef8\u306e\u4ea4\u70b9\u306f\u3001<\/strong>\u95a2\u6570\u306e\u8868\u73fe\u304c\u5ea7\u6a19\u8ef8\u3068\u4ea4\u5dee\u3059\u308b\u70b9\u3001\u3064\u307e\u308a X \u8ef8\u3068 l \u8ef8\u3092\u7d50\u3076\u30b0\u30e9\u30d5\u4e0a\u306e\u70b9\u3067\u3059\u3002 Y\u8ef8\u3002<\/p>\n<p>\u305f\u3068\u3048\u3070\u3001\u6b21\u306e\u30b0\u30e9\u30d5\u306e\u653e\u7269\u7dda\u306f\u70b9 (0,3) \u3067 Y \u8ef8\u3068\u4ea4\u5dee\u3057\u3001\u70b9 (-1,0) \u304a\u3088\u3073 (3,0) \u3067 X \u8ef8\u3068\u4ea4\u5dee\u3057\u307e\u3059\u3002 <\/p>\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/uploads\/2023\/07\/points-de-coupe-ou-dintersection-d-une-fonction-avec-les-axes.webp\" alt=\"\u95a2\u6570\u3068\u8ef8\u306e\u5207\u65ad\u70b9\u307e\u305f\u306f\u4ea4\u70b9\" class=\"wp-image-306\" width=\"413\" height=\"413\" srcset=\"\" sizes=\"auto, \" data-src=\"\"><\/figure>\n<\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"punto-de-corte-de-una-funcion-con-el-eje-x\"><\/span> X\u8ef8\u306b\u3088\u308b\u95a2\u6570\u306e\u30ab\u30c3\u30c8\u30dd\u30a4\u30f3\u30c8<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u3057\u305f\u304c\u3063\u3066\u3001\u95a2\u6570\u3068 X \u8ef8\u306e\u4ea4\u70b9\u306e 2 \u756a\u76ee\u306e\u5ea7\u6a19\u306f\u5e38\u306b 0 \u306b\u306a\u308a\u307e\u3059\u3002 <\/p>\n<div style=\"background:linear-gradient(to bottom, #FFFFFF 0%, #FFE0B2 100%); padding-top: 23px; padding-bottom: 0.5px; padding-right: 30px; padding-left: 30px; border: 2px dashed #FF9B28; border-radius:20px;\">\n<p style=\"text-align:left\">\u4efb\u610f\u306e x \u8ef8\u95a2\u6570 OX \u306e\u30ab\u30c3\u30c8\u30aa\u30d5\u70b9\u306f\u6b21\u306e\u5f62\u5f0f\u306b\u306a\u308a\u307e\u3059\u3002<\/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-73f7f9618f43f69c0d8a68ff9b47ffef_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"(a,0)\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"38\" style=\"vertical-align: -5px;\"><\/p>\n<p>\u3067\u3042\u308a\u3001\u6b21\u306e\u65b9\u7a0b\u5f0f\u3092\u89e3\u304f\u3053\u3068\u3067\u8a08\u7b97\u3067\u304d\u307e\u3059\u3002<\/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-0bce6c022ed0fc63f4659af75888f96c_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"f(x)=0\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"67\" style=\"vertical-align: -5px;\"><\/p>\n<\/p>\n<\/div>\n<p>\u3053\u306e\u65b9\u7a0b\u5f0f\u3092\u89e3\u304f\u3068\u304d\u306b\u30012 \u3064 (\u307e\u305f\u306f\u305d\u308c\u4ee5\u4e0a) \u306e\u89e3\u304c\u5f97\u3089\u308c\u308b\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u306f\u3001\u95a2\u6570\u304c X \u8ef8\u3068 2 \u56de (\u307e\u305f\u306f\u305d\u308c\u4ee5\u4e0a) \u4ea4\u5dee\u3059\u308b\u3053\u3068\u3092\u610f\u5473\u3057\u307e\u3059\u3002\u4e00\u65b9\u3001\u65b9\u7a0b\u5f0f\u306b\u89e3\u304c\u306a\u3044\u5834\u5408\u306f\u3001\u95a2\u6570\u304c X \u8ef8\u3068\u4ea4\u5dee\u3057\u3066\u3044\u306a\u3044\u3053\u3068\u3092\u610f\u5473\u3057\u307e\u3059\u3002 <\/p>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"punto-de-corte-de-una-funcion-con-el-eje-y\"><\/span> Y\u8ef8\u306b\u3088\u308b\u95a2\u6570\u306e\u30ab\u30c3\u30c8\u30dd\u30a4\u30f3\u30c8<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u3057\u305f\u304c\u3063\u3066\u3001\u95a2\u6570\u3068 Y \u8ef8\u306e\u4ea4\u70b9\u306e\u6700\u521d\u306e\u5ea7\u6a19\u306f\u5e38\u306b 0 \u306b\u306a\u308a\u307e\u3059\u3002 <\/p>\n<div style=\"background:linear-gradient(to bottom, #FFFFFF 0%, #FFE0B2 100%); padding-top: 23px; padding-bottom: 0.5px; padding-right: 30px; padding-left: 30px; border: 2px dashed #FF9B28; border-radius:20px;\">\n<p style=\"text-align:left\"> y \u8ef8 OY \u3092\u6301\u3064\u95a2\u6570\u306e\u30ab\u30c3\u30c8\u30aa\u30d5\u70b9\u306f\u6b21\u306e\u5f62\u5f0f\u306b\u306a\u308a\u307e\u3059\u3002<\/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-739f630b0003287e8f4168b83abd3259_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"(0,a)\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"38\" style=\"vertical-align: -5px;\"><\/p>\n<p> \u3001\u305d\u3057\u3066 x=0 \u3067\u306e\u95a2\u6570\u306e\u30a4\u30e1\u30fc\u30b8\u3092\u8a08\u7b97\u3059\u308b\u3053\u3068\u3067\u898b\u3064\u3051\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/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-095a60291d4bd1f4834090b3eea3ba03_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"f(0)\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"33\" style=\"vertical-align: -5px;\"><\/p>\n<\/p>\n<\/div>\n<p> X \u8ef8\u4e0a\u306e\u30d6\u30ec\u30fc\u30af\u30dd\u30a4\u30f3\u30c8\u3068\u306f\u7570\u306a\u308a\u3001Y \u8ef8\u4e0a\u306e\u30d6\u30ec\u30fc\u30af\u30dd\u30a4\u30f3\u30c8\u306f 1 \u3064\u3060\u3051\u3067\u3059\u3002 <\/p>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"ejemplo-de-como-calcular-los-puntos-de-corte-de-una-funcion-con-los-ejes\"><\/span>\u8ef8\u3092\u4f7f\u7528\u3057\u305f\u95a2\u6570\u306e\u30ab\u30c3\u30c8\u30aa\u30d5\u70b9\u3092\u8a08\u7b97\u3059\u308b\u4f8b<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u7591\u3044\u306e\u306a\u3044\u3088\u3046\u306b\u3001\u30c7\u30ab\u30eb\u30c8\u8ef8\u3092\u4f7f\u7528\u3057\u3066\u95a2\u6570\u306e\u30ab\u30c3\u30c8\u30dd\u30a4\u30f3\u30c8\u3092\u898b\u3064\u3051\u308b\u65b9\u6cd5\u306e\u4f8b\u3092\u4ee5\u4e0b\u306b\u793a\u3057\u307e\u3059\u3002<\/p>\n<ul>\n<li>\u6b21\u306e\u95a2\u6570\u306e\u30ab\u30c3\u30c8\u30aa\u30d5\u70b9\u3092\u6570\u5024\u7684\u306b\u6c42\u3081\u307e\u3059\u3002<\/li>\n<\/ul>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-66583fbfc29adcc458ca9278781956ee_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"f(x)=-2x+4\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"122\" style=\"vertical-align: -5px;\"><\/p>\n<\/p>\n<p>\u307e\u305a\u3001x \u8ef8\u3092\u4f7f\u7528\u3057\u3066\u95a2\u6570\u306e\u30ab\u30c3\u30c8\u30aa\u30d5 \u30dd\u30a4\u30f3\u30c8\u3092\u8a08\u7b97\u3057\u307e\u3059\u3002 <strong>X \u8ef8\u3068\u306e\u4ea4\u70b9\u306f<\/strong>\u5e38\u306b 0 \u306b\u7b49\u3057\u3044 2 \u756a\u76ee\u306e\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3092\u6301\u3061\u307e\u3059\u3002\u3064\u307e\u308a\u3001\u6b21\u306e\u30bf\u30a4\u30d7\u306b\u306a\u308a\u307e\u3059\u3002<\/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-73f7f9618f43f69c0d8a68ff9b47ffef_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"(a,0)\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"38\" style=\"vertical-align: -5px;\"><\/p>\n<p> \u3002 f(x) \u306f OX \u8ef8\u4e0a\u3067\u5e38\u306b 0 \u306b\u7b49\u3057\u3044\u305f\u3081\u3067\u3059\u3002\u3057\u305f\u304c\u3063\u3066\u3001\u70b9\u306e\u4ed6\u306e\u6210\u5206\u3092\u898b\u3064\u3051\u308b\u306b\u306f\u3001\u65b9\u7a0b\u5f0f\u3092\u89e3\u304f\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002 <\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-05bb421b504b7ae4aa483574cd6f28d5_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"f(x)=0:\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"76\" 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-0bce6c022ed0fc63f4659af75888f96c_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"f(x)=0\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"67\" 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-d2cbefcee2bd8d00196109ec35122749_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"-2x+4=0\" title=\"Rendered by QuickLaTeX.com\" height=\"14\" width=\"95\" 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-9bff5f534f1955d41026f5ef95b12498_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"-2x=-4\" title=\"Rendered by QuickLaTeX.com\" height=\"12\" width=\"78\" style=\"vertical-align: 0px;\"><\/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-f4053786f809507a3ff38b6a58b876a9_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"x=\\cfrac{-4}{-2}=2\" title=\"Rendered by QuickLaTeX.com\" height=\"38\" width=\"98\" style=\"vertical-align: -12px;\"><\/p>\n<\/p>\n<p>\u3057\u305f\u304c\u3063\u3066\u3001X \u8ef8\u3068\u306e\u4ea4\u70b9\u306f\u6b21\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/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-9109f132c97f810054198982440ac8c2_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\bm{(2,0)}\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"38\" style=\"vertical-align: -5px;\"><\/p>\n<\/p>\n<p>\u6b21\u306b\u3001y \u8ef8\u3068\u306e\u4ea4\u70b9\u3092\u898b\u3064\u3051\u307e\u3059\u3002 <strong>Y \u8ef8\u3068\u306e\u4ea4\u70b9\u306f<\/strong>\u5e38\u306b 0 \u306b\u7b49\u3057\u3044\u6700\u521d\u306e\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8\u3092\u6301\u3061\u307e\u3059\u3002\u3064\u307e\u308a\u3001\u70b9\u306f\u6b21\u306e\u30bf\u30a4\u30d7\u306b\u306a\u308a\u307e\u3059\u3002<\/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-739f630b0003287e8f4168b83abd3259_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"(0,a)\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"38\" style=\"vertical-align: -5px;\"><\/p>\n<p> \u3002\u72ec\u7acb\u5909\u6570<em>x<\/em>\u306f\u5e38\u306b Y \u8ef8\u4e0a\u3067\u30ad\u30e3\u30f3\u30bb\u30eb\u3055\u308c\u308b\u305f\u3081\u3002\u3057\u305f\u304c\u3063\u3066\u3001\u70b9\u306e\u4ed6\u306e\u5ea7\u6a19\u3092\u898b\u3064\u3051\u308b\u306b\u306f\u3001\u8a08\u7b97\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059<\/p>\n<p class=\"has-text-align-center\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/ql-cache\/quicklatex.com-8f92d7beea0ed3a053927c2d429d3450_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"f(0):\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"42\" 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-787bef78715f07326d73529c31be0a11_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"f(0)=-2 \\cdot 0+4=4\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"164\" style=\"vertical-align: -5px;\"><\/p>\n<\/p>\n<p>\u3057\u305f\u304c\u3063\u3066\u3001Y \u8ef8\u3068\u306e\u4ea4\u70b9\u306f\u6b21\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/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-d0aa7bcc7acd9b70190168abbe3d05d9_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\bm{(0,4)}\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"38\" style=\"vertical-align: -5px;\"><\/p>\n<\/p>\n<p>\u4ee5\u4e0b\u306b\u95a2\u6570\u306e\u4f8b\u3092\u30b0\u30e9\u30d5\u3067\u793a\u3057\u307e\u3059\u3002\u898b\u3064\u304b\u3063\u305f\u3057\u304d\u3044\u5024\u304c\u30b0\u30e9\u30d5\u5185\u306e\u3057\u304d\u3044\u5024\u3068\u4e00\u81f4\u3057\u3066\u3044\u308b\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\u3002 <\/p>\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\"><img decoding=\"async\" loading=\"lazy\" src=\"https:\/\/mathority.org\/wp-content\/uploads\/2023\/07\/comment-trouver-les-points-de-coupure-d-une-fonction-avec-les-axes.webp\" alt=\"\u8ef8\u306e\u3042\u308b\u95a2\u6570\u306e\u30ab\u30c3\u30c8\u30dd\u30a4\u30f3\u30c8\u3092\u898b\u3064\u3051\u308b\u65b9\u6cd5\" class=\"wp-image-309\" width=\"309\" height=\"328\" srcset=\"\" sizes=\"auto, \" data-src=\"\"><\/figure>\n<\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"ejercicios-resueltos-de-puntos-de-corte-de-una-funcion-con-los-ejes\"><\/span>\u8ef8\u306e\u3042\u308b\u95a2\u6570\u306e\u30ab\u30c3\u30c8\u30dd\u30a4\u30f3\u30c8\u306b\u95a2\u3059\u308b\u6f14\u7fd2\u3092\u89e3\u6c7a\u3057\u307e\u3057\u305f<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3 class=\"wp-block-heading\">\u6f14\u7fd2 1<\/h3>\n<p>\u6b21\u306e\u95a2\u6570\u306e\u5ea7\u6a19\u8ef8\u3092\u4f7f\u7528\u3057\u3066\u5207\u65ad\u70b9\u3092\u6c7a\u5b9a\u3057\u307e\u3059\u3002 <\/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-447bac271b899fc6d87ee8fc9f3d87b5_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"f(x)=3x-3\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"108\" style=\"vertical-align: -5px;\"><\/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__E6F9EF\" role=\"button\" tabindex=\"0\" aria-expanded=\"false\" data-otfm-spc=\"#E6F9EF\" style=\"text-align:center\">\n<div class=\"otfm-sp__title\"><strong>\u89e3\u6c7a\u7b56\u3092\u898b\u308b<\/strong><\/div>\n<\/div>\n<p class=\"has-text-align-left\"><strong>X\u8ef8\u3092\u4f34\u3046\u5207\u65ad\u70b9<\/strong><\/p>\n<p class=\"has-text-align-left\">\u95a2\u6570\u3068 X \u8ef8\u306e\u4ea4\u70b9\u3092\u898b\u3064\u3051\u308b\u306b\u306f\u3001\u6b21\u3092\u89e3\u304f\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002 <\/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-05bb421b504b7ae4aa483574cd6f28d5_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"f(x)=0:\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"76\" 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-0bce6c022ed0fc63f4659af75888f96c_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"f(x)=0\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"67\" 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-b7291fed5da122f14a1b5cbafc13559e_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"3x-3=0\" title=\"Rendered by QuickLaTeX.com\" height=\"12\" width=\"82\" style=\"vertical-align: 0px;\"><\/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-b39e9a661c099f0b13442a0dd3ba5700_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"3x=3\" title=\"Rendered by QuickLaTeX.com\" height=\"12\" width=\"52\" style=\"vertical-align: 0px;\"><\/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-64407431d2b1206ab172819ab1928e50_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"x=\\cfrac{3}{3}=1\" title=\"Rendered by QuickLaTeX.com\" height=\"38\" width=\"76\" style=\"vertical-align: -12px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-left\">\u3057\u305f\u304c\u3063\u3066\u3001\u95a2\u6570\u3068 X \u8ef8\u306e\u4ea4\u70b9\u306f\u6b21\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/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-84f3677bb18b0fdcb23f9f99693d049e_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\bm{(1,0)}\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"38\" style=\"vertical-align: -5px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-left\"> <strong>Y\u8ef8\u3092\u4f34\u3046\u5207\u65ad\u70b9<\/strong><\/p>\n<p class=\"has-text-align-left\">Y \u8ef8\u3068\u306e\u4ea4\u70b9\u3092\u898b\u3064\u3051\u308b\u306b\u306f\u3001\u8a08\u7b97\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002 <\/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-8f92d7beea0ed3a053927c2d429d3450_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"f(0):\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"42\" 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-a83e45cdffe32b2ee0599ddd1f0ae4bd_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"f(0)=3\\cdot 0 -3= -3\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"165\" style=\"vertical-align: -5px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-left\">\u3057\u305f\u304c\u3063\u3066\u3001\u95a2\u6570\u3068 Y \u8ef8\u306e\u4ea4\u70b9\u306f\u6b21\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002 <\/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-e89904be28df22207ae43a7379270316_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\bm{(0,-3)}\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"52\" style=\"vertical-align: -5px;\"><\/p>\n<\/p>\n<div class=\"wp-block-otfm-box-spoiler-end otfm-sp_end\"><\/div>\n<h3 class=\"wp-block-heading\">\u6f14\u7fd2 2<\/h3>\n<p>\u6b21\u306e\u30a2\u30d5\u30a3\u30f3\u95a2\u6570\u306e\u30c7\u30ab\u30eb\u30c8\u8ef8\u3068\u306e\u4ea4\u70b9\u3092\u898b\u3064\u3051\u307e\u3059\u3002 <\/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-e733087b3bf20359712e748e2e3d5764_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"f(x)=2x+8\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"108\" style=\"vertical-align: -5px;\"><\/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__E6F9EF\" role=\"button\" tabindex=\"0\" aria-expanded=\"false\" data-otfm-spc=\"#E6F9EF\" style=\"text-align:center\">\n<div class=\"otfm-sp__title\"><strong>\u89e3\u6c7a\u7b56\u3092\u898b\u308b<\/strong><\/div>\n<\/div>\n<p class=\"has-text-align-left\"><strong>X\u8ef8\u3092\u4f34\u3046\u5207\u65ad\u70b9<\/strong><\/p>\n<p class=\"has-text-align-left\">OX \u8ef8\u3092\u4f7f\u7528\u3057\u305f\u95a2\u6570\u306e\u9650\u754c\u70b9\u3092\u898b\u3064\u3051\u308b\u306b\u306f\u3001\u95a2\u6570\u3092\u30bc\u30ed\u306b\u8a2d\u5b9a\u3057\u3001\u7d50\u679c\u3068\u3057\u3066\u5f97\u3089\u308c\u308b\u65b9\u7a0b\u5f0f\u3092\u89e3\u304f\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002 <\/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-0bce6c022ed0fc63f4659af75888f96c_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"f(x)=0\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"67\" 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-cdcfe575c0789863873671ec42ab16ae_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"2x+8=0\" title=\"Rendered by QuickLaTeX.com\" height=\"14\" width=\"82\" 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-dc7337d181b4e08c25470427998bc646_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"2x=-8\" title=\"Rendered by QuickLaTeX.com\" height=\"12\" width=\"66\" style=\"vertical-align: 0px;\"><\/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-fbbfe13092d0b2e10696de59568d6433_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"x=\\cfrac{-8}{2}=-4\" title=\"Rendered by QuickLaTeX.com\" height=\"38\" width=\"113\" style=\"vertical-align: -12px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-left\">\u3057\u305f\u304c\u3063\u3066\u3001\u95a2\u6570\u3068\u6a2a\u8ef8\u306e\u4ea4\u70b9\u306f\u6b21\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/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-fe3caa28378743e8250e55c03d1ac7ca_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\bm{(-4,0)}\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"51\" style=\"vertical-align: -5px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-left\"> <strong>Y\u8ef8\u3092\u4f34\u3046\u5207\u65ad\u70b9<\/strong><\/p>\n<p class=\"has-text-align-left\">OY \u8ef8\u3067\u30ab\u30c3\u30c8\u30aa\u30d5 \u30dd\u30a4\u30f3\u30c8\u3092\u898b\u3064\u3051\u308b\u306b\u306f\u3001\u6b21\u306e\u3088\u3046\u306b\u8a08\u7b97\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002 <\/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-8f92d7beea0ed3a053927c2d429d3450_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"f(0):\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"42\" 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-1444b23eab6cd020e38565fafd74d31b_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"f(0)=2\\cdot 0 +8= 8\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"151\" style=\"vertical-align: -5px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-left\">\u3057\u305f\u304c\u3063\u3066\u3001\u95a2\u6570\u3068\u30b3\u30f3\u30d4\u30e5\u30fc\u30bf\u30fc\u8ef8\u306e\u4ea4\u70b9\u306f\u6b21\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002 <\/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-105b970552c775092fe96f1b5251d9b4_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\bm{(0,8)}\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"38\" style=\"vertical-align: -5px;\"><\/p>\n<\/p>\n<div class=\"wp-block-otfm-box-spoiler-end otfm-sp_end\"><\/div>\n<h3 class=\"wp-block-heading\">\u6f14\u7fd2 3<\/h3>\n<p>\u6b21\u306e\u4e8c\u6b21\u95a2\u6570\u306e\u8ef8\u3092\u4f7f\u7528\u3057\u3066\u30ab\u30c3\u30c8\u30aa\u30d5 \u30dd\u30a4\u30f3\u30c8\u3092\u8a08\u7b97\u3057\u307e\u3059\u3002 <\/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-d43d784f066ade6ba00e0c2e5f910774_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"f(x)=x^2-3x+2\" title=\"Rendered by QuickLaTeX.com\" height=\"20\" width=\"146\" style=\"vertical-align: -5px;\"><\/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__E6F9EF\" role=\"button\" tabindex=\"0\" aria-expanded=\"false\" data-otfm-spc=\"#E6F9EF\" style=\"text-align:center\">\n<div class=\"otfm-sp__title\"><strong>\u89e3\u6c7a\u7b56\u3092\u898b\u308b<\/strong><\/div>\n<\/div>\n<p class=\"has-text-align-left\"><strong>X\u8ef8\u3092\u4f34\u3046\u5207\u65ad\u70b9<\/strong><\/p>\n<p class=\"has-text-align-left\">\u95a2\u6570\u3068 X \u8ef8\u306e\u4ea4\u70b9\u3092\u898b\u3064\u3051\u308b\u306b\u306f\u3001\u6b21\u3092\u89e3\u304f\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002 <\/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-05bb421b504b7ae4aa483574cd6f28d5_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"f(x)=0:\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"76\" 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-0bce6c022ed0fc63f4659af75888f96c_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"f(x)=0\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"67\" 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-c8a3b8c7361e03cf0cfeb06bc32627f0_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"x^2-3x+2=0\" title=\"Rendered by QuickLaTeX.com\" height=\"17\" width=\"122\" style=\"vertical-align: -2px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-left\">\u3053\u306e\u5834\u5408\u3001\u4e8c\u6b21\u65b9\u7a0b\u5f0f\u3092\u89e3\u304f\u5fc5\u8981\u304c\u3042\u308b\u305f\u3081\u3001\u6b21\u306e\u516c\u5f0f\u3092\u9069\u7528\u3057\u307e\u3059\u3002 <\/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-31cf15f08af9aa5c86f1f39728544b3c_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\displaystyle x =\\cfrac{-b \\pm \\sqrt{b^2 -4ac}}{2a}\" title=\"Rendered by QuickLaTeX.com\" height=\"41\" width=\"165\" style=\"vertical-align: -12px;\"><\/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-47048fdd48ce98ba99629edf5a379f76_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\displaystyle x=\\cfrac{ -(-3) \\pm \\sqrt{(-3)^2-4\\cdot 1 \\cdot 2}}{2\\cdot 1} = \\cfrac{3 \\pm 1}{2} = \\begin{cases} 2 \\\\[2ex] 1 \\end{cases}\" title=\"Rendered by QuickLaTeX.com\" height=\"65\" width=\"364\" style=\"vertical-align: 0px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-left\">\u4e8c\u6b21\u65b9\u7a0b\u5f0f\u306e 2 \u3064\u306e\u89e3\u304c\u5f97\u3089\u308c\u305f\u305f\u3081\u3001\u95a2\u6570\u306f 2 \u3064\u306e\u70b9\u3067 X \u8ef8\u3068\u4ea4\u5dee\u3057\u307e\u3059\u3002<\/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-34015e4c89221f8acc0e76fc0f301550_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\bm{(1,0)} \\qquad \\bm{(2,0)}\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"112\" style=\"vertical-align: -5px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-left\"> <strong>Y\u8ef8\u3092\u4f34\u3046\u5207\u65ad\u70b9<\/strong><\/p>\n<p class=\"has-text-align-left\">\u4e00\u65b9\u3001Y\u8ef8\u3068\u306e\u4ea4\u70b9\u3092\u6c42\u3081\u308b\u306b\u306f\u3001\u6b21\u306e\u3088\u3046\u306b\u8a08\u7b97\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002 <\/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-8f92d7beea0ed3a053927c2d429d3450_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"f(0):\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"42\" 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-037e5e8037e4c4a3e1b8daeffe909aa1_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"f(0)=0^2-3\\cdot 0+2= 2\" title=\"Rendered by QuickLaTeX.com\" height=\"20\" width=\"188\" style=\"vertical-align: -5px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-left\">\u3057\u305f\u304c\u3063\u3066\u3001\u95a2\u6570\u3068 Y \u8ef8\u306e\u552f\u4e00\u306e\u4ea4\u70b9\u306f\u6b21\u306e\u3068\u304a\u308a\u3067\u3059\u3002 <\/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-6928e231184fd28bd944d9531a322d74_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\bm{(0,2)}\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"38\" style=\"vertical-align: -5px;\"><\/p>\n<\/p>\n<div class=\"wp-block-otfm-box-spoiler-end otfm-sp_end\"><\/div>\n<h3 class=\"wp-block-heading\">\u6f14\u7fd2 4<\/h3>\n<p>\u6b21\u306e\u6709\u7406\u95a2\u6570\u306e\u30c7\u30ab\u30eb\u30c8\u5e73\u9762\u306e\u8ef8\u3068\u306e\u4ea4\u70b9\u3092\u898b\u3064\u3051\u307e\u3059\u3002 <\/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-0c6588a40aa5d636b904df48cdc63f43_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"f(x)=\\cfrac{5}{x}\" title=\"Rendered by QuickLaTeX.com\" height=\"39\" width=\"71\" style=\"vertical-align: -12px;\"><\/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__E6F9EF\" role=\"button\" tabindex=\"0\" aria-expanded=\"false\" data-otfm-spc=\"#E6F9EF\" style=\"text-align:center\">\n<div class=\"otfm-sp__title\"><strong>\u89e3\u6c7a\u7b56\u3092\u898b\u308b<\/strong><\/div>\n<\/div>\n<p class=\"has-text-align-left\"><strong>X\u8ef8\u3092\u4f34\u3046\u5207\u65ad\u70b9<\/strong><\/p>\n<p class=\"has-text-align-left\">\u95a2\u6570\u3068 X \u8ef8\u306e\u4ea4\u70b9\u3092\u898b\u3064\u3051\u308b\u306b\u306f\u3001\u6b21\u3092\u89e3\u304f\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002 <\/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-05bb421b504b7ae4aa483574cd6f28d5_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"f(x)=0:\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"76\" 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-0bce6c022ed0fc63f4659af75888f96c_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"f(x)=0\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"67\" 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-5c2f253c2098f7e0688564532f048904_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\cfrac{5}{x}=0\" title=\"Rendered by QuickLaTeX.com\" height=\"39\" width=\"43\" style=\"vertical-align: -12px;\"><\/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-e761a1a13a81d25e434a24c11cb263ee_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"5=0\\cdot x\" title=\"Rendered by QuickLaTeX.com\" height=\"13\" width=\"64\" style=\"vertical-align: 0px;\"><\/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-884c8e1ffbde4b09284840f90e1a642e_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"5=0\" title=\"Rendered by QuickLaTeX.com\" height=\"13\" width=\"42\" style=\"vertical-align: 0px;\"><\/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-120ad4537dbe55170dae71719cf66566_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"5\\neq 0\" title=\"Rendered by QuickLaTeX.com\" height=\"17\" width=\"42\" style=\"vertical-align: -4px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-left\"> 5 \u306f 0 \u3068\u7b49\u4fa1\u3067\u306f\u306a\u3044\u305f\u3081\u3001\u65b9\u7a0b\u5f0f\u306b\u306f\u89e3\u304c\u306a\u304f\u3001\u3057\u305f\u304c\u3063\u3066\u95a2\u6570\u3068 X \u8ef8\u306e\u9593\u306b\u4ea4\u70b9\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n<p class=\"has-text-align-left\"> <strong>Y\u8ef8\u3092\u4f34\u3046\u5207\u65ad\u70b9<\/strong><\/p>\n<p class=\"has-text-align-left\">Y \u8ef8\u3068\u306e\u4ea4\u70b9\u3092\u898b\u3064\u3051\u308b\u306b\u306f\u3001\u8a08\u7b97\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002 <\/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-8f92d7beea0ed3a053927c2d429d3450_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"f(0):\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"42\" 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-d11baf5490eb4560f276585a0b0ee6f8_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"f(0)=\\cfrac{5}{0}= \\infty\" title=\"Rendered by QuickLaTeX.com\" height=\"39\" width=\"108\" style=\"vertical-align: -12px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-left\">\u30bc\u30ed\u3067\u5272\u3063\u305f\u6570\u5024\u306f\u7121\u9650\u5927\u3092\u4e0e\u3048\u308b\u4e0d\u78ba\u5b9a\u6027\u3067\u3059\u3002\u3057\u305f\u304c\u3063\u3066\u3001\u95a2\u6570\u306f\u3069\u306e\u70b9\u3067\u3082 Y \u8ef8\u3092\u8d8a\u3048\u308b\u3053\u3068\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n<p class=\"has-text-align-left\">\u3064\u307e\u308a\u3001\u904b\u52d5\u95a2\u6570<strong>\u306b\u306f\u8ef8\u3068\u306e\u4ea4\u70b9\u304c\u3042\u308a\u307e\u305b\u3093<\/strong>\u3002\u3064\u307e\u308a\u3001\u305d\u306e\u30b0\u30e9\u30d5\u306f\u3069\u306e\u70b9\u3067\u3082 X \u8ef8\u307e\u305f\u306f Y \u8ef8\u3092\u901a\u904e\u3057\u307e\u305b\u3093\u3002<\/p>\n<div class=\"wp-block-otfm-box-spoiler-end otfm-sp_end\"><\/div>\n<h3 class=\"wp-block-heading\">\u6f14\u7fd2 5<\/h3>\n<p>\u6b21\u306e 3 \u6b21\u95a2\u6570\u306e\u8ef8\u3092\u4f7f\u7528\u3057\u3066\u30ab\u30c3\u30c8\u30aa\u30d5 \u30dd\u30a4\u30f3\u30c8\u3092\u8a08\u7b97\u3057\u307e\u3059\u3002 <\/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-91cb8246270e79763a0cbadd5bda610b_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"f(x)=x^3-9x\" title=\"Rendered by QuickLaTeX.com\" height=\"20\" width=\"117\" style=\"vertical-align: -5px;\"><\/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__E6F9EF\" role=\"button\" tabindex=\"0\" aria-expanded=\"false\" data-otfm-spc=\"#E6F9EF\" style=\"text-align:center\">\n<div class=\"otfm-sp__title\"><strong>\u89e3\u6c7a\u7b56\u3092\u898b\u308b<\/strong><\/div>\n<\/div>\n<p class=\"has-text-align-left\"><strong>X\u8ef8\u3092\u4f34\u3046\u5207\u65ad\u70b9<\/strong><\/p>\n<p class=\"has-text-align-left\">\u95a2\u6570\u3068 X \u8ef8\u306e\u4ea4\u70b9\u3092\u898b\u3064\u3051\u308b\u306b\u306f\u3001\u6b21\u3092\u89e3\u304f\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002 <\/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-05bb421b504b7ae4aa483574cd6f28d5_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"f(x)=0:\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"76\" 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-0bce6c022ed0fc63f4659af75888f96c_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"f(x)=0\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"67\" 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-b9b6c5eb5845339d1864ff4c341b1128_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"x^3-9x=0\" title=\"Rendered by QuickLaTeX.com\" height=\"15\" width=\"91\" style=\"vertical-align: 0px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-left\">\u65b9\u7a0b\u5f0f\u306e\u4e21\u65b9\u306e\u9805\u306b\u306f<em>x<\/em>\u304c\u3042\u308a\u3001\u3053\u308c\u3092\u4f7f\u7528\u3057\u3066\u5171\u901a\u56e0\u6570\u3092\u62bd\u51fa\u3067\u304d\u307e\u3059\u3002<\/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-3279d8df0d4b242b861866c675e1241c_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"x(x^2-9)=0\" title=\"Rendered by QuickLaTeX.com\" height=\"20\" width=\"105\" style=\"vertical-align: -5px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-left\">\u524d\u8ff0\u306e\u7b49\u5f0f\u304c\u6e80\u305f\u3055\u308c\u308b\u306b\u306f\u3001\u56e0\u5b50\u306e 1 \u3064\u304c 0 \u3067\u306a\u3051\u308c\u3070\u306a\u308a\u307e\u305b\u3093\u3002\u3057\u305f\u304c\u3063\u3066\u3001\u8003\u3048\u3089\u308c\u308b\u3059\u3079\u3066\u306e\u89e3\u3092\u53d6\u5f97\u3059\u308b\u306b\u306f\u3001\u5404\u56e0\u5b50\u3092 0 \u306b\u8a2d\u5b9a\u3057\u307e\u3059\u3002<\/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-37febaed85a502533604305b9009611d_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\displaystyle x(x^2-9)=0 \\ \\longrightarrow \\begin{cases} \\bm{x = 0} \\\\[2ex] x^2-9 = 0\\ \\longrightarrow \\ x^2=9 \\ \\longrightarrow \\ \\bm{x=\\pm 3} \\end{cases}\" title=\"Rendered by QuickLaTeX.com\" height=\"65\" width=\"453\" style=\"vertical-align: 0px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-left\">\u3057\u305f\u304c\u3063\u3066\u30013 \u6b21\u65b9\u7a0b\u5f0f\u306e 3 \u3064\u306e\u89e3\u304c\u5f97\u3089\u308c\u305f\u305f\u3081\u3001\u95a2\u6570\u306f X \u8ef8\u3092 3 \u3064\u306e\u70b9\u3067\u5207\u65ad\u3057\u307e\u3059\u3002<\/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-a2ce13d316debbfa000812492c9e95eb_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\bm{(-3,0)} \\qquad \\bm{(0,0)} \\qquad \\bm{(3,0)}\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"201\" style=\"vertical-align: -5px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-left\"> <strong>Y\u8ef8\u3092\u4f34\u3046\u5207\u65ad\u70b9<\/strong><\/p>\n<p class=\"has-text-align-left\">Y \u8ef8\u3067\u30ab\u30c3\u30c8\u30dd\u30a4\u30f3\u30c8\u3092\u8a08\u7b97\u3059\u308b\u306b\u306f\u3001\u6b21\u306e\u3088\u3046\u306b\u8a08\u7b97\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002 <\/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-8f92d7beea0ed3a053927c2d429d3450_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"f(0):\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"42\" 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-4d670efac6ee1ce9704c9fe94c3b1e6b_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"f(0)=0^3-9\\cdot 0 = 0\" title=\"Rendered by QuickLaTeX.com\" height=\"20\" width=\"158\" style=\"vertical-align: -5px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-left\">\u3057\u305f\u304c\u3063\u3066\u3001\u95a2\u6570\u3068 Y \u8ef8\u306e\u552f\u4e00\u306e\u4ea4\u70b9\u306f\u5ea7\u6a19\u539f\u70b9 (0,0) \u3067\u3059\u3002<\/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-2c790019bd70403eba876c59c82c0f9c_l3.png\" class=\"ql-img-inline-formula quicklatex-auto-format\" alt=\"\\bm{(0,0)}\" title=\"Rendered by QuickLaTeX.com\" height=\"19\" width=\"38\" style=\"vertical-align: -5px;\"><\/p>\n<\/p>\n<p class=\"has-text-align-left\">\u3053\u306e\u95a2\u6570\u306f\u4e21\u65b9\u306e\u8ef8\u3067\u540c\u6642\u306b\u3053\u306e\u70b9\u3092\u30ab\u30c3\u30c8\u3059\u308b\u305f\u3081\u3001X \u8ef8\u3067\u306e\u30ab\u30c3\u30c8\u70b9\u306e\u8a08\u7b97\u3067\u3053\u306e\u70b9\u304c\u3059\u3067\u306b\u898b\u3064\u304b\u3063\u3066\u3044\u308b\u3053\u3068\u306b\u6ce8\u610f\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<div class=\"wp-block-otfm-box-spoiler-end otfm-sp_end\"><\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u3053\u306e\u30da\u30fc\u30b8\u3067\u306f\u3001\u95a2\u6570\u3068\u30c7\u30ab\u30eb\u30c8\u8ef8\u306e\u4ea4\u70b9 (\u307e\u305f\u306f\u4ea4\u5dee) 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