{"id":366,"date":"2023-07-04T11:55:40","date_gmt":"2023-07-04T11:55:40","guid":{"rendered":"https:\/\/mathority.org\/ja\/%e3%83%87%e3%83%bb%e3%83%b4%e3%82%a1%e3%82%a4%e3%82%a8%e3%83%ab%e3%82%b7%e3%83%a5%e3%83%88%e3%83%a9%e3%82%b9%e3%81%ae%e5%ae%9a%e7%90%86\/"},"modified":"2023-07-04T11:55:40","modified_gmt":"2023-07-04T11:55:40","slug":"%e3%83%87%e3%83%bb%e3%83%b4%e3%82%a1%e3%82%a4%e3%82%a8%e3%83%ab%e3%82%b7%e3%83%a5%e3%83%88%e3%83%a9%e3%82%b9%e3%81%ae%e5%ae%9a%e7%90%86","status":"publish","type":"post","link":"https:\/\/mathority.org\/ja\/%e3%83%87%e3%83%bb%e3%83%b4%e3%82%a1%e3%82%a4%e3%82%a8%e3%83%ab%e3%82%b7%e3%83%a5%e3%83%88%e3%83%a9%e3%82%b9%e3%81%ae%e5%ae%9a%e7%90%86\/","title":{"rendered":"\u30ef\u30a4\u30a8\u30eb\u30b7\u30e5\u30c8\u30e9\u30b9\u306e\u5b9a\u7406"},"content":{"rendered":"

\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001\u30ef\u30a4\u30a8\u30eb\u30b7\u30e5\u30c8\u30e9\u30b9\u306e\u5b9a\u7406\u306e\u5b9a\u7fa9\u3092\u8aac\u660e\u3057\u307e\u3059\u3002\u3055\u3089\u306b\u3001\u30ef\u30a4\u30a8\u30eb\u30b7\u30e5\u30c8\u30e9\u30b9\u306e\u5b9a\u7406\u3092\u6bb5\u968e\u7684\u306b\u89e3\u304f\u3044\u304f\u3064\u304b\u306e\u7df4\u7fd2\u554f\u984c\u3092\u7df4\u7fd2\u3057\u3066\u3001\u5b8c\u5168\u306b\u7406\u89e3\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002 <\/p>\n

<\/span>\u30ef\u30a4\u30a8\u30eb\u30b7\u30e5\u30c8\u30e9\u30b9\u306e\u5b9a\u7406\u306e\u8aac\u660e<\/span><\/h2>\n

\u30ef\u30a4\u30a8\u30eb\u30b7\u30e5\u30c8\u30e9\u30b9\u306e\u5b9a\u7406\u306b\u3088\u308c\u3070\u3001\u95a2\u6570\u304c\u9589\u3058\u305f\u533a\u9593\u3067\u9023\u7d9a\u3067\u3042\u308b\u5834\u5408\u3001\u305d\u306e\u95a2\u6570\u306f\u305d\u306e\u533a\u9593\u3067\u7d76\u5bfe\u6700\u5927\u5024\u3068\u7d76\u5bfe\u6700\u5c0f\u5024\u3092\u6301\u3061\u307e\u3059\u3002<\/strong><\/p>\n

\u27a4<\/span> \u300c \u9023\u7d9a\u95a2\u6570\u3068\u306f\u4f55\u3067\u3059\u304b?\u300d<\/a><\/span>\u3092\u53c2\u7167\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/strong><\/p>\n

\u30ef\u30a4\u30a8\u30eb\u30b7\u30e5\u30c8\u30e9\u30b9\u306e\u5b9a\u7406\u306f\u3001\u6700\u5927\u5024\u3068\u6700\u5c0f\u5024\u304c\u5b58\u5728\u3059\u308b\u3053\u3068\u306e\u307f\u3092\u8ff0\u3079\u3066\u3044\u307e\u3059\u304c\u3001\u3053\u308c\u3089\u306e\u70b9\u306e\u5024\u3092\u8a08\u7b97\u3059\u308b\u3053\u3068\u306f\u5f79\u306b\u7acb\u3061\u307e\u305b\u3093\u3002 <\/p>\n

\n
\"\u30ef\u30a4\u30a2\u30fc\u30b7\u30e5\u30c8\u30e9\u30b9\u306e\u5b9a\u7406\"<\/figure>\n<\/div>\n

\u305f\u3068\u3048\u3070\u3001\u4e0a\u8a18\u306e\u30b0\u30e9\u30d5\u306e\u95a2\u6570\u306f\u533a\u9593 [a,b] \u3067\u9023\u7d9a\u3057\u3066\u304a\u308a\u3001\u3053\u306e\u533a\u9593\u306b\u6700\u5c0f\u5024\u3068\u6700\u5927\u5024\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u3089 2 \u3064\u306e\u70b9\u306e\u6b63\u78ba\u306a\u5ea7\u6a19\u3092\u77e5\u308b\u3053\u3068\u306f\u3067\u304d\u307e\u305b\u3093\u304c\u3001\u95a2\u6570\u304c\u533a\u9593\u5185\u306b\u3053\u308c\u3089 2 \u3064\u306e\u7aef\u70b9\u3092\u6301\u3064\u3053\u3068\u306f\u308f\u304b\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n

\u27a4<\/span>\u53c2\u7167:<\/strong> \u95a2\u6570\u306e\u6700\u5927\u5024\u3068\u6700\u5c0f\u5024\u3092\u8a08\u7b97\u3059\u308b\u65b9\u6cd5<\/a><\/span><\/p>\n

\u3053\u306e\u95a2\u6570\u306f\u533a\u9593\u5168\u4f53\u306b\u308f\u305f\u3063\u3066\u9023\u7d9a\u3057\u3066\u3044\u308b\u305f\u3081\u3001\u540c\u3058\u533a\u9593\u306b\u308f\u305f\u3063\u3066\u7d76\u5bfe\u6700\u5c0f\u5024\u3068\u7d76\u5bfe\u6700\u5927\u5024\u306e\u9593\u306e\u3059\u3079\u3066\u306e\u53ef\u80fd\u306a\u5024\u3092\u53d6\u308b\u3053\u3068\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n

\u3055\u3089\u306b\u3001\u30ef\u30a4\u30a8\u30eb\u30b7\u30e5\u30c8\u30e9\u30b9\u306e\u5b9a\u7406\u306e\u7d50\u679c\u3068\u3057\u3066\u3001\u9589\u533a\u9593\u4e0a\u306e\u4efb\u610f\u306e\u9023\u7d9a\u95a2\u6570\u306f\u306e\u4e0a\u4e0b\u306b\u5236\u9650\u3055\u308c<\/strong>\u3001\u95a2\u6570\u306e\u4e0a\u9650\u3068\u4e0b\u9650\u306f\u305d\u308c\u305e\u308c\u7d76\u5bfe\u6700\u5927\u5024\u3068\u7d76\u5bfe\u6700\u5c0f\u5024\u3067\u3042\u308b\u3068\u63a8\u6e2c\u3067\u304d\u307e\u3059\u3002<\/p>\n

\u6570\u5b66\u7684\u306b\u306f\u3001\u30ef\u30a4\u30a8\u30eb\u30b7\u30e5\u30c8\u30e9\u30b9\u306e\u5b9a\u7406\u306f\u6b21\u306e\u3088\u3046\u306b\u8868\u73fe\u3067\u304d\u307e\u3059\u3002<\/p>\n<\/p>\n

\"f(x_1)\\leq<\/p>\n<\/p>\n

\u91d1<\/p>\n<\/p>\n

\"x_1\"<\/p>\n

\u305d\u3057\u3066<\/p>\n

\"x_2\"<\/p>\n

\u9589\u533a\u9593\u306b\u542b\u307e\u308c\u308b 2 \u3064\u306e\u70b9 (\u305d\u308c\u305e\u308c\u7d76\u5bfe\u6700\u5c0f\u5024\u3068\u7d76\u5bfe\u6700\u5927\u5024)<\/p>\n

\"[a,b]\"<\/p>\n

\u95a2\u6570\u304c\u5b9a\u7fa9\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n

\u30ef\u30a4\u30a8\u30eb\u30b7\u30e5\u30c8\u30e9\u30b9\u306e\u5b9a\u7406\u306e\u8a3c\u660e\u306f\u975e\u5e38\u306b\u8907\u96d1\u3067\u3001\u6982\u5ff5\u306b\u306f\u3042\u307e\u308a\u5bc4\u4e0e\u3057\u306a\u3044\u305f\u3081\u3001\u3053\u306e\u8a18\u4e8b\u3067\u306f\u8aac\u660e\u3057\u307e\u305b\u3093\u3002\u91cd\u8981\u306a\u3053\u3068\u306f\u3001\u30ef\u30a4\u30a8\u30eb\u30b7\u30e5\u30c8\u30e9\u30b9\u306e\u5b9a\u7406\u3068\u306f\u4f55\u304b\u3001\u305d\u3057\u3066\u305d\u308c\u304c\u4f55\u306b\u4f7f\u7528\u3055\u308c\u308b\u306e\u304b\u3092\u7406\u89e3\u3059\u308b\u3053\u3068\u3067\u3059\u3002 <\/p>\n

<\/span>\u30ef\u30a4\u30a8\u30eb\u30b7\u30e5\u30c8\u30e9\u30b9\u306e\u5b9a\u7406\u3067\u89e3\u6c7a\u3055\u308c\u305f\u554f\u984c<\/span><\/h2>\n

\u6f14\u7fd2 1<\/h3>\n

\u6b21\u306e\u95a2\u6570\u304c\u63d0\u6848\u3055\u308c\u305f\u9593\u9694\u306b\u5236\u9650\u3055\u308c\u3066\u3044\u308b\u304b\u3069\u3046\u304b\u3092\u5224\u65ad\u3057\u307e\u3059\u3002<\/p>\n<\/p>\n

\"f(x)=\\log_3(x-4)<\/p>\n<\/p>\n

\u27a4<\/span>\u53c2\u7167:<\/strong>\u5bfe\u6570\u95a2\u6570\u306e\u5b9a\u7fa9\u57df<\/a><\/span><\/p>\n

\n
\u89e3\u6c7a\u7b56\u3092\u53c2\u7167<\/strong><\/div>\n<\/div>\n

\u30ef\u30a4\u30a8\u30eb\u30b7\u30e5\u30c8\u30e9\u30b9\u306e\u5b9a\u7406\u3092\u9069\u7528\u3059\u308b\u3053\u3068\u3067\u3001\u95a2\u6570\u304c\u533a\u9593 [5,10] \u3067\u5236\u9650\u3055\u308c\u3066\u3044\u308b\u304b\u3069\u3046\u304b\u3092\u5224\u65ad\u3067\u304d\u307e\u3059\u3002\u3057\u305f\u304c\u3063\u3066\u3001\u95a2\u6570\u304c\u3053\u306e\u533a\u9593\u3067\u9023\u7d9a\u3067\u3042\u308b\u304b\u3069\u3046\u304b\u3092\u77e5\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u3092\u884c\u3046\u306b\u306f\u3001\u5bfe\u6570\u95a2\u6570\u306e\u5b9a\u7fa9\u57df\u3092\u8a08\u7b97\u3057\u307e\u3059\u3002 <\/p>\n<\/p>\n

\"x-40″ title=”Rendered by QuickLaTeX.com” height=”14″ width=”73″ style=”vertical-align: -2px;”><\/p>\n<\/p>\n

\"x4″ title=”Rendered by QuickLaTeX.com” height=”14″ width=”43″ style=”vertical-align: -2px;”><\/p>\n<\/p>\n

\"\\text{Dom<\/p>\n<\/p>\n

\u3053\u306e\u95a2\u6570\u306f x=4 \u3088\u308a\u5927\u304d\u3044\u3059\u3079\u3066\u306e\u5024\u306b\u5bfe\u3057\u3066\u9023\u7d9a\u3067\u3042\u308b\u305f\u3081\u3001\u533a\u9593 [5,10] \u3067\u9023\u7d9a\u3067\u3059\u3002<\/p>\n

\u3057\u305f\u304c\u3063\u3066\u3001\u3053\u306e\u95a2\u6570\u306f\u533a\u9593 [5,10] \u306b\u95a2\u3059\u308b\u30ef\u30a4\u30a8\u30eb\u30b7\u30e5\u30c8\u30e9\u30b9\u306e\u5b9a\u7406\u3092\u6e80\u305f\u3057\u307e\u3059\u3002\u3053\u308c\u306f\u3001\u3053\u306e\u533a\u9593\u306e\u4e0a\u4e0b\u306b\u5236\u9650\u304c\u3042\u308b\u3053\u3068\u3092\u610f\u5473\u3057\u307e\u3059\u3002<\/p>\n

<\/div>\n

\u6f14\u7fd2 2<\/h3>\n

\u6b21\u306e\u95a2\u6570\u306b\u3001\u63d0\u6848\u3055\u308c\u305f\u9593\u9694\u306b\u308f\u305f\u3063\u3066\u6700\u5927\u5024\u304a\u3088\u3073\/\u307e\u305f\u306f\u6700\u5c0f\u5024\u304c\u3042\u308b\u304b\u3069\u3046\u304b\u3092\u5224\u65ad\u3057\u307e\u3059\u3002<\/p>\n<\/p>\n

\"f(x)=\\cfrac{3x^2-4}{2x-4}<\/p>\n<\/p>\n

\u27a4<\/span>\u53c2\u7167:<\/strong>\u6709\u7406\u95a2\u6570\u306e\u5b9a\u7fa9\u57df<\/a><\/span><\/p>\n

\n
\u89e3\u6c7a\u7b56\u3092\u53c2\u7167<\/strong><\/div>\n<\/div>\n

\u307e\u305a\u3001\u6709\u7406\u95a2\u6570\u306e\u9023\u7d9a\u6027\u3092\u5206\u6790\u3057\u307e\u3059\u3002 <\/p>\n<\/p>\n

\"2x-4=0\"<\/p>\n<\/p>\n

\"2x=4\"<\/p>\n<\/p>\n

\"x=\\cfrac{4}{2}=2\"<\/p>\n<\/p>\n

\"\\text{Dom<\/p>\n<\/p>\n

\u305f\u3060\u3057\u3001\u3053\u306e\u95a2\u6570\u306f x=2 \u3067\u4e0d\u9023\u7d9a\u6027\u3092\u793a\u3057\u3066\u304a\u308a\u3001\u3053\u308c\u306f\u533a\u9593 [-3,3] \u3067\u9023\u7d9a\u3067\u306f\u306a\u3044\u3053\u3068\u3092\u610f\u5473\u3057\u307e\u3059\u3002<\/p>\n

\u3064\u307e\u308a\u3001\u3053\u306e\u95a2\u6570\u306f\u30ef\u30a4\u30a8\u30eb\u30b7\u30e5\u30c8\u30e9\u30b9\u306e\u5b9a\u7406\u3092\u6e80\u305f\u3055\u306a\u3044\u305f\u3081\u3001\u3053\u306e\u533a\u9593\u306b\u6700\u5c0f\u5024\u304c\u3042\u308b\u306e\u304b\u6700\u5927\u5024\u304c\u3042\u308b\u306e\u304b\u3092\u5224\u65ad\u3067\u304d\u307e\u305b\u3093\u3002<\/p>\n

<\/div>\n

\u6f14\u7fd2 3<\/h3>\n

\u6b21\u306e\u95a2\u6570\u304c\u63d0\u6848\u3055\u308c\u305f\u9593\u9694\u5185\u306b\u6700\u5927\u5024\u304a\u3088\u3073\/\u307e\u305f\u306f\u6700\u5c0f\u5024\u3092\u6301\u3064\u304b\u3069\u3046\u304b\u3092\u5224\u65ad\u3057\u3001\u3053\u308c\u3089\u306e\u70b9\u3092\u8a08\u7b97\u3057\u307e\u3059\u3002<\/p>\n<\/p>\n

\"f(x)=x^2+3<\/p>\n<\/p>\n

\u27a4<\/span>\u53c2\u7167:<\/strong>2 \u6b21\u95a2\u6570\u306e\u7279\u6027<\/a><\/span><\/p>\n

\n
\u89e3\u6c7a\u7b56\u3092\u53c2\u7167<\/strong><\/div>\n<\/div>\n

\u4e8c\u6b21\u95a2\u6570\u306e\u5b9a\u7fa9\u57df\u306f\u3059\u3079\u3066\u5b9f\u6570\u3067\u3059\u3002<\/p>\n<\/p>\n

\"\\text{Dom<\/p>\n<\/p>\n

\u3057\u305f\u304c\u3063\u3066\u3001\u3053\u306e\u95a2\u6570\u306f\u533a\u9593 [0,4] \u3067\u9023\u7d9a\u3067\u3042\u308a\u3001\u30ef\u30a4\u30a8\u30eb\u30b7\u30e5\u30c8\u30e9\u30b9\u306e\u5b9a\u7406\u3092\u6e80\u305f\u3057\u307e\u3059\u3002\u3057\u305f\u304c\u3063\u3066\u3001\u3053\u306e\u95a2\u6570\u306b\u306f\u3001\u3053\u306e\u9593\u9694\u3067\u7d76\u5bfe\u6700\u5c0f\u5024\u3068\u7d76\u5bfe\u6700\u5927\u5024\u304c\u5b58\u5728\u3057\u307e\u3059\u3002<\/p>\n

\u3055\u3089\u306b\u3001\u3053\u306e\u653e\u7269\u7dda\u306e\u9802\u70b9\u306f\u6b63\u78ba\u306b x=0 \u306b\u3042\u308b\u305f\u3081\u3001\u95a2\u6570\u306f\u533a\u9593 [0,4] \u3067\u53b3\u5bc6\u306b\u5897\u52a0\u3057\u3001\u305d\u306e\u7d50\u679c\u3001\u6700\u5c0f\u5024\u306f x=0 \u3067\u3001\u6700\u5927\u5024\u306f x= 4 \u306b\u306a\u308a\u307e\u3059\u3002 <\/p>\n<\/p>\n

\"\\text{M\\'inimo<\/p>\n<\/p>\n

\"\\text{M\\'aximo<\/p>\n<\/p>\n

<\/div>\n

<\/span>\u30ab\u30fc\u30eb\u30fb\u30f4\u30a1\u30a4\u30a8\u30eb\u30b7\u30e5\u30c8\u30e9\u30b9<\/span><\/h2>\n

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\u30ab\u30fc\u30eb\u30fb\u30c6\u30aa\u30c9\u30fc\u30eb\u30fb\u30f4\u30a3\u30eb\u30d8\u30eb\u30e0\u30fb\u30f4\u30a1\u30a4\u30a8\u30eb\u30b7\u30e5\u30c8\u30e9\u30b9\u306f<\/strong>\u300119 \u4e16\u7d00\u306e\u30c9\u30a4\u30c4\u306e\u975e\u5e38\u306b\u91cd\u8981\u306a\u6570\u5b66\u8005\u3067\u3057\u305f\u3002\u3088\u308a\u6b63\u78ba\u306b\u306f\u30011815 \u5e74 10 \u6708 31 \u65e5\u306b\u30aa\u30b9\u30c6\u30f3\u30d5\u30a7\u30eb\u30c7\u3067\u751f\u307e\u308c\u30011897 \u5e74 2 \u6708 19 \u65e5\u306b\u30d9\u30eb\u30ea\u30f3\u3067\u4ea1\u304f\u306a\u308a\u307e\u3057\u305f\u3002<\/p>\n

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