\n\u4e09\u6b21\u95a2\u6570\u306e\u30b0\u30e9\u30d5\u306b\u95a2\u3057\u3066\u3082\u7279\u5fb4\u304c\u3042\u308b\u306e\u3067, \u554f\u984c\u3092\u901a\u3057\u3066\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/div>\n<\/div>\n<\/div>\n
\u554f\u984c\u306f\u5168\u90e8\u30675\u554f\u3067\u3059\u3002
\n\u305d\u308c\u3067\u306f\u65e9\u901f\u3044\u3063\u3066\u307f\u307e\u3057\u3087\u3046\uff01<\/p>\n
\u4e09\u6b21\u95a2\u6570\u306e\u30af\u3099\u30e9\u30d5\u306e\u5e38\u8b58\u2015\u2015\u554f\u984c\u7de8<\/h2>\n\n\u7b2c\uff11\u554f<\/div>\n\n\u4e09\u6b21\u95a2\u6570$y=ax^3 +bx^2 +cx+d$\u306e\u30b0\u30e9\u30d5\u3068\u3057\u3066\u8003\u3048\u3089\u308c\u308b\u3082\u306e\u306f\u6b21\u306e\u3046\u3061\u3069\u308c\u3067\u3057\u3087\u3046\u3002\u3059\u3079\u3066\u9078\u3093\u3067\u304f\u3060\u3055\u3044\u3002\u305f\u3060\u3057, $a > 0$\u3068\u3057\u307e\u3059\u3002<\/strong>
\n![\"\"]()
<\/a><\/p>\n<\/div>\n<\/div>\n <\/p>\n
\n\u7b2c\uff12\u554f<\/div>\n\n\u66f2\u7dda$y=x^3 \u2212x$\u306e\u30b0\u30e9\u30d5\u306f\u6b21\u306e\u3046\u3061\u3069\u308c\u3067\u3057\u3087\u3046\u3002<\/strong>
\n![\"\"]()
<\/a><\/p>\n<\/div>\n<\/div>\n <\/p>\n
\n\u7b2c\uff13\u554f<\/div>\n\n\u66f2\u7dda$y = x(x\u22123)^2$\u306e\u30b0\u30e9\u30d5\u306f\u6b21\u306e\u3046\u3061\u3069\u308c\u3067\u3057\u3087\u3046\u3002<\/strong>
\n![\"\"]()
<\/a><\/p>\n<\/div>\n<\/div>\n <\/p>\n
\n\u7b2c\uff14\u554f<\/div>\n\n\u95a2\u6570$f(x)=x(x\u22123)^2$\u306e$0 \\leqq x \\leqq 3$\u306b\u304a\u3051\u308b\u6700\u5927\u5024\u3092\u3068\u308b$x$\u306e\u5024\u306f\u4f55\u3067\u3057\u3087\u3046\u3002<\/strong><\/p>\n<\/div>\n<\/div>\n <\/p>\n
\n\u7b2c\uff15\u554f<\/div>\n\n\u66f2\u7dda$y=x^3 \u2212x$\u4e0a\u306e\u70b9$(\u22121, 0)$\u306b\u304a\u3051\u308b\u63a5\u7dda\u3068, \u66f2\u7dda$y=x^3 \u2212x$\u3068\u306e\u5171\u6709\u70b9\u3068\u306e$x$\u5ea7\u6a19\u306f\u4f55\u3067\u3057\u3087\u3046\u3002<\/strong>
\n![\"\"]()
<\/a><\/a><\/p>\n<\/div>\n<\/div>\n<\/p>\n
\u4e09\u6b21\u95a2\u6570\u306e\u30af\u3099\u30e9\u30d5\u306e\u5e38\u8b58\u2015\u2015\u89e3\u8aac\u7de8<\/h2>\n\n\u7b2c\uff11\u554f<\/div>\n\n\u4e09\u6b21\u95a2\u6570$y=ax^3 +bx^2 +cx+d$\u306e\u30b0\u30e9\u30d5\u3068\u3057\u3066\u8003\u3048\u3089\u308c\u308b\u3082\u306e\u306f\u6b21\u306e\u3046\u3061\u3069\u308c\u3067\u3057\u3087\u3046\u3002\u3059\u3079\u3066\u9078\u3093\u3067\u304f\u3060\u3055\u3044\u3002\u305f\u3060\u3057, $a > 0$\u3068\u3057\u307e\u3059\u3002
\n<\/a>![\"\"]()
<\/a>
\n<\/strong><\/p>\n<\/div>\n<\/div>\n <\/p>\n
\u7b2c\uff11\u554f\u306e\u89e3\u8aac<\/span><\/h3>\n\u6b63\u89e3\u306f \u2462, \u2463, \u2464\u3067\u3059\u3002<\/p>\n
\u95a2\u6570$f(x)=ax^3 +bx^2 +cx+d(a > 0)$\u306b\u3064\u3044\u3066\u8003\u3048\u3066\u307f\u307e\u3059\u3002
\n$f'(x)$\u306f$x$\u306e2\u6b21\u5f0f\u3068\u306a\u308b\u304b\u3089, \u4e8c\u6b21\u65b9\u7a0b\u5f0f$f'(x)=0$\u306e\u89e3\u306f,<\/span><\/p>\n\u7570\u306a\u308b$2$\u5b9f\u89e3\u3000\u3000\u3000\u91cd\u89e3\u3000\u3000\u3000\u5b9f\u6570\u89e3\u306a\u3057<\/p>\n
\u306b\u9650\u3089\u308c\u307e\u3059\u3002\u3057\u305f\u304c\u3063\u3066, $f(x)$\u306e\u5897\u6e1b\u8868\u306f\u4e0b\u306e$3$\u7a2e\u985e\u3057\u304b\u3042\u308a\u307e\u305b\u3093\u3002
\n\u3064\u307e\u308a, $y=f(x)$\u306e\u30b0\u30e9\u30d5\u306e\u6982\u5f62\u3082$3$\u7a2e\u985e\u3067\u3059\u3002
\n<\/a>![\"\"]()
<\/a>
\n\u307e\u305f, \u2460\u306f\u4e00\u6b21\u95a2\u6570, \u2465, \u2466, \u2467\u306f\u56db\u6b21\u95a2\u6570\u306e\u30b0\u30e9\u30d5\u3067\u3059\u3002\u3055\u3089\u306b, \u4e09\u6b21\u95a2\u6570\u306e\u30b0\u30e9\u30d5\u306f\u70b9\u5bfe\u79f0\u306e\u30b0\u30e9\u30d5\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n
\n <\/p>\n
\n\u7b2c\uff12\u554f<\/div>\n\n\u66f2\u7dda$y=x^3 \u2212x$\u306e\u30b0\u30e9\u30d5\u306f\u6b21\u306e\u3046\u3061\u3069\u308c\u3067\u3057\u3087\u3046\u3002<\/strong>
\n![\"\"]()
<\/a><\/p>\n<\/div>\n<\/div>\n <\/p>\n
\u7b2c2\u554f\u306e\u89e3\u8aac<\/span><\/h3>\n\u6b63\u89e3\u306f \u2462\u3067\u3059\u3002<\/p>\n
$x^3 \u2212x=(x+1)x(x\u22121)$\u3067\u3042\u308b\u304b\u3089, \u65b9\u7a0b\u5f0f$x^3 \u2212x=0$\u306e\u5b9f\u6570\u89e3\u306f$x=\u22121, 0, 1$\u3067\u3059\u3002\u3053\u308c\u306f,$y=x^3 \u2212x$\u306e\u30b0\u30e9\u30d5\u304c$y=0$\u306e\u30b0\u30e9\u30d5, \u3059\u306a\u308f\u3061$x$\u8ef8\u3068, $x=\u22121, 0, 1$\u306e$3$\u70b9\u3067\u4ea4\u308f\u308b\u3053\u3068\u3092\u610f\u5473\u3057\u307e\u3059\u3002\u3061\u306a\u307f\u306b\u5bfe\u79f0\u306e\u4e2d\u5fc3\u306f$x=0$ \u306b\u5bfe\u5fdc\u3059\u308b\u70b9\u306b\u306a\u308a\u307e\u3059\u3002
\n![\"\"]()
<\/a><\/p>\n
\n <\/p>\n
\n\u7b2c\uff13\u554f<\/div>\n\n\u66f2\u7dda$y = x(x\u22123)^2$\u306e\u30b0\u30e9\u30d5\u306f\u6b21\u306e\u3046\u3061\u3069\u308c\u3067\u3057\u3087\u3046\u3002<\/strong>
\n![\"\"]()
<\/a><\/p>\n<\/div>\n<\/div>\n <\/p>\n
\u7b2c3\u554f\u306e\u89e3\u8aac<\/span><\/h3>\n\u6b63\u89e3\u306f\u2461\u3067\u3059\u3002<\/p>\n
\u65b9\u7a0b\u5f0f$x(x\u22123)^2 =0$\u306e\u5b9f\u6570\u89e3\u306f$x=0, 3$(\u91cd\u89e3)\u3067\u3059\u3002\u3053\u308c\u306f, $y=x(x\u22123)^2$\u306e\u30b0\u30e9\u30d5\u304c$y=0$\u306e\u30b0\u30e9\u30d5, \u3059\u306a\u308f\u3061x \u8ef8\u3068, $x=0$\u3067\u4ea4\u308f\u308a, $x=3$\u3067\u63a5\u3059\u308b\u3053\u3068\u3092\u610f\u5473\u3057\u307e\u3059\u3002
\n![\"\"]()
<\/a><\/p>\n
\n <\/p>\n
\n\u7b2c\uff14\u554f<\/div>\n\n\u95a2\u6570$f(x)=x(x\u22123)^2$\u306e$0 \\leqq x \\leqq 3$\u306b\u304a\u3051\u308b\u6700\u5927\u5024\u3092\u3068\u308b$x$\u306e\u5024\u306f\u4f55\u3067\u3057\u3087\u3046\u3002<\/strong><\/p>\n<\/div>\n<\/div>\n <\/p>\n
\u7b2c4\u554f\u306e\u89e3\u8aac<\/span><\/h3>\n\u6b63\u89e3\u306f$x=1$\u3067\u3059\u3002<\/p>\n
\u6975\u5024\u3092$2$\u3064\u3082\u3064\u4e09\u6b21\u95a2\u6570\u306e\u30b0\u30e9\u30d5\u306f\u9069\u5207\u306a\u51e6\u7406(\u5e73\u884c\u79fb\u52d5\u306a\u3069) \u3092\u3059\u308b\u3068,$y=ax(x\u22123\u03b1)^2 (a,\u03b1 > 0)$\u306e\u30b0\u30e9\u30d5\u3068\u4e00\u81f4\u3057\u307e\u3059\u3002$f(x)=ax(x\u22123\u03b1)^2$\u3068\u304a\u304d, \u65b9\u7a0b\u5f0f$f(\u03b1)=f(x)$\u3092\u89e3\u304f\u3068, $x=\u03b1$(\u91cd\u89e3)$,4\u03b1$\u3068\u306a\u308a\u307e\u3059\u3002\u3057\u305f\u304c\u3063\u3066, $y=f(x)$\u30b0\u30e9\u30d5\u3092\u66f8\u304f\u3068\u4e0b\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002
\n![\"\"]()
<\/a><\/p>\n\u4e09\u6b21\u95a2\u6570\u306e\u30b0\u30e9\u30d5\u304c\u70b9\u5bfe\u79f0\u3067\u3042\u308b\u3053\u3068\u3092\u8003\u3048\u308b\u3068, \u6975\u5024\u3092$2$\u3064\u3082\u3064\u4e09\u6b21\u95a2\u6570\u306e\u30b0\u30e9\u30d5\u306f, \u9577\u65b9\u5f62$8$\u7b49\u5206\u306e\u4e2d\u306b\u53ce\u307e\u308a\u307e\u3059\u3002
\n![\"\"]()
<\/a><\/p>\n\u4eca\u56de\u306e\u5834\u5408\u306f, \u4e0b\u306e\u56f3\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002
\n![\"\"]()
<\/a><\/p>\n
\n <\/p>\n
\n\u7b2c\uff15\u554f<\/div>\n\n\u66f2\u7dda$y=x^3 \u2212x$\u4e0a\u306e\u70b9$(\u22121, 0)$\u306b\u304a\u3051\u308b\u63a5\u7dda\u3068, \u66f2\u7dda$y=x^3 \u2212x$\u3068\u306e\u5171\u6709\u70b9\u3068\u306e$x$\u5ea7\u6a19\u306f\u4f55\u3067\u3057\u3087\u3046\u3002<\/strong>
\n![\"\"]()
<\/a><\/p>\n<\/div>\n<\/div>\n <\/p>\n
\u7b2c5\u554f\u306e\u89e3\u8aac<\/span><\/span><\/h3>\n\u6b63\u89e3\u306f$x=\u22121, 2$\u3067\u3059\u3002<\/p>\n
\u4e09\u6b21\u95a2\u6570\u306e\u30b0\u30e9\u30d5C\u306e\u70b9\u5bfe\u79f0\u306e\u4e2d\u5fc3\u3092P\u3068\u3057, \u70b9A\u306b\u304a\u3051\u308bC\u306e\u63a5\u7dda\u3068C\u306e\u4ea4\u70b9\u306e\u3046\u3061A\u3067\u306a\u3044\u65b9\u3092B\u3068\u3057\u307e\u3059\u3002
\n![\"\"]()
<\/a><\/p>\n\u56f3\u306e\u3088\u3046\u306b,$x$\u5ea7\u6a19\u306e\u5dee\u304c$1 : 2$\u306b\u306a\u308b\u3068\u3044\u3046\u6027\u8cea\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u306f\u9577\u65b9\u5f62$8$\u7b49\u5206\u306e\u4e2d\u306b\u53ce\u307e\u308b\u3053\u3068\u306e\u62e1\u5f35\u3067\u3059\u3002\u5e73\u884c\u56db\u8fba\u5f62$8$\u7b49\u5206\u306e\u4e2d\u306b\u53ce\u307e\u308a\u307e\u3059\u3002
\n<\/a>![\"\"]()
<\/a>
\n$y=x^3 \u2212x$\u306e\u30b0\u30e9\u30d5\u306f\u7b2c2 \u554f\u3067\u898b\u305f\u3088\u3046\u306b\u539f\u70b9\u5bfe\u79f0\u3067\u3042\u308b\u304b\u3089, \u4eca\u56de\u306f\u4e0b\u306e\u56f3\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002
\n![\"\"]()
<\/a><\/p>\n\u304a\u308f\u308a\u306b<\/h2>\n
\u4eca\u56de\u7d39\u4ecb\u3057\u305f\u6027\u8cea\u306f, \u7b54\u3048\u3092\u51fa\u3059\u3060\u3051\u306a\u3089\u6642\u9593\u3082\u304b\u3051\u305a\u306b\u6bd4\u8f03\u7684\u6613\u3057\u3044\u8a08\u7b97\u306e\u307f\u3067\u51fa\u305b\u308b\u306e\u3067\u4fbf\u5229\u3067\u3059\u3002<\/p>\n
\u8a18\u8ff0\u8a66\u9a13\u3067\u306f\u3057\u3063\u304b\u308a\u5897\u6e1b\u3092\u8abf\u3079\u305f\u308a,\u65b9\u7a0b\u5f0f\u3092\u89e3\u3044\u305f\u308a\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u306e\u3067\u6ce8\u610f\u3067\u3059\u3002
\n\u305f\u3060, \u5171\u901a\u30c6\u30b9\u30c8\u306e\u3088\u3046\u306a\u30de\u30fc\u30af\u30b7\u30fc\u30c8\u5f0f\u306e\u8a66\u9a13\u306a\u3069\u3067\u306f\u5a01\u529b\u3092\u767a\u63ee\u3059\u308b\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n
\u305d\u308c\u3067\u306f, \u4eca\u56de\u306f\u3053\u306e\u8fba\u3067\uff01
\n
\u4e09\u6b21\u95a2\u6570$y=ax^3 +bx^2 +cx+d$\u306e\u30b0\u30e9\u30d5\u3068\u3057\u3066\u8003\u3048\u3089\u308c\u308b\u3082\u306e\u306f\u6b21\u306e\u3046\u3061\u3069\u308c\u3067\u3057\u3087\u3046\u3002\u3059\u3079\u3066\u9078\u3093\u3067\u304f\u3060\u3055\u3044\u3002\u305f\u3060\u3057, $a > 0$\u3068\u3057\u307e\u3059\u3002<\/strong> <\/p>\n \u66f2\u7dda$y=x^3 \u2212x$\u306e\u30b0\u30e9\u30d5\u306f\u6b21\u306e\u3046\u3061\u3069\u308c\u3067\u3057\u3087\u3046\u3002<\/strong> <\/p>\n \u66f2\u7dda$y = x(x\u22123)^2$\u306e\u30b0\u30e9\u30d5\u306f\u6b21\u306e\u3046\u3061\u3069\u308c\u3067\u3057\u3087\u3046\u3002<\/strong> <\/p>\n \u95a2\u6570$f(x)=x(x\u22123)^2$\u306e$0 \\leqq x \\leqq 3$\u306b\u304a\u3051\u308b\u6700\u5927\u5024\u3092\u3068\u308b$x$\u306e\u5024\u306f\u4f55\u3067\u3057\u3087\u3046\u3002<\/strong><\/p>\n<\/div>\n<\/div>\n <\/p>\n \u66f2\u7dda$y=x^3 \u2212x$\u4e0a\u306e\u70b9$(\u22121, 0)$\u306b\u304a\u3051\u308b\u63a5\u7dda\u3068, \u66f2\u7dda$y=x^3 \u2212x$\u3068\u306e\u5171\u6709\u70b9\u3068\u306e$x$\u5ea7\u6a19\u306f\u4f55\u3067\u3057\u3087\u3046\u3002<\/strong> <\/p>\n \u4e09\u6b21\u95a2\u6570$y=ax^3 +bx^2 +cx+d$\u306e\u30b0\u30e9\u30d5\u3068\u3057\u3066\u8003\u3048\u3089\u308c\u308b\u3082\u306e\u306f\u6b21\u306e\u3046\u3061\u3069\u308c\u3067\u3057\u3087\u3046\u3002\u3059\u3079\u3066\u9078\u3093\u3067\u304f\u3060\u3055\u3044\u3002\u305f\u3060\u3057, $a > 0$\u3068\u3057\u307e\u3059\u3002 <\/p>\n \u6b63\u89e3\u306f \u2462, \u2463, \u2464\u3067\u3059\u3002<\/p>\n \u95a2\u6570$f(x)=ax^3 +bx^2 +cx+d(a > 0)$\u306b\u3064\u3044\u3066\u8003\u3048\u3066\u307f\u307e\u3059\u3002 \u7570\u306a\u308b$2$\u5b9f\u89e3\u3000\u3000\u3000\u91cd\u89e3\u3000\u3000\u3000\u5b9f\u6570\u89e3\u306a\u3057<\/p>\n \u306b\u9650\u3089\u308c\u307e\u3059\u3002\u3057\u305f\u304c\u3063\u3066, $f(x)$\u306e\u5897\u6e1b\u8868\u306f\u4e0b\u306e$3$\u7a2e\u985e\u3057\u304b\u3042\u308a\u307e\u305b\u3093\u3002 <\/p>\n \u66f2\u7dda$y=x^3 \u2212x$\u306e\u30b0\u30e9\u30d5\u306f\u6b21\u306e\u3046\u3061\u3069\u308c\u3067\u3057\u3087\u3046\u3002<\/strong> <\/p>\n \u6b63\u89e3\u306f \u2462\u3067\u3059\u3002<\/p>\n $x^3 \u2212x=(x+1)x(x\u22121)$\u3067\u3042\u308b\u304b\u3089, \u65b9\u7a0b\u5f0f$x^3 \u2212x=0$\u306e\u5b9f\u6570\u89e3\u306f$x=\u22121, 0, 1$\u3067\u3059\u3002\u3053\u308c\u306f,$y=x^3 \u2212x$\u306e\u30b0\u30e9\u30d5\u304c$y=0$\u306e\u30b0\u30e9\u30d5, \u3059\u306a\u308f\u3061$x$\u8ef8\u3068, $x=\u22121, 0, 1$\u306e$3$\u70b9\u3067\u4ea4\u308f\u308b\u3053\u3068\u3092\u610f\u5473\u3057\u307e\u3059\u3002\u3061\u306a\u307f\u306b\u5bfe\u79f0\u306e\u4e2d\u5fc3\u306f$x=0$ \u306b\u5bfe\u5fdc\u3059\u308b\u70b9\u306b\u306a\u308a\u307e\u3059\u3002 <\/p>\n \u66f2\u7dda$y = x(x\u22123)^2$\u306e\u30b0\u30e9\u30d5\u306f\u6b21\u306e\u3046\u3061\u3069\u308c\u3067\u3057\u3087\u3046\u3002<\/strong> <\/p>\n \u6b63\u89e3\u306f\u2461\u3067\u3059\u3002<\/p>\n \u65b9\u7a0b\u5f0f$x(x\u22123)^2 =0$\u306e\u5b9f\u6570\u89e3\u306f$x=0, 3$(\u91cd\u89e3)\u3067\u3059\u3002\u3053\u308c\u306f, $y=x(x\u22123)^2$\u306e\u30b0\u30e9\u30d5\u304c$y=0$\u306e\u30b0\u30e9\u30d5, \u3059\u306a\u308f\u3061x \u8ef8\u3068, $x=0$\u3067\u4ea4\u308f\u308a, $x=3$\u3067\u63a5\u3059\u308b\u3053\u3068\u3092\u610f\u5473\u3057\u307e\u3059\u3002 <\/p>\n \u95a2\u6570$f(x)=x(x\u22123)^2$\u306e$0 \\leqq x \\leqq 3$\u306b\u304a\u3051\u308b\u6700\u5927\u5024\u3092\u3068\u308b$x$\u306e\u5024\u306f\u4f55\u3067\u3057\u3087\u3046\u3002<\/strong><\/p>\n<\/div>\n<\/div>\n <\/p>\n \u6b63\u89e3\u306f$x=1$\u3067\u3059\u3002<\/p>\n \u6975\u5024\u3092$2$\u3064\u3082\u3064\u4e09\u6b21\u95a2\u6570\u306e\u30b0\u30e9\u30d5\u306f\u9069\u5207\u306a\u51e6\u7406(\u5e73\u884c\u79fb\u52d5\u306a\u3069) \u3092\u3059\u308b\u3068,$y=ax(x\u22123\u03b1)^2 (a,\u03b1 > 0)$\u306e\u30b0\u30e9\u30d5\u3068\u4e00\u81f4\u3057\u307e\u3059\u3002$f(x)=ax(x\u22123\u03b1)^2$\u3068\u304a\u304d, \u65b9\u7a0b\u5f0f$f(\u03b1)=f(x)$\u3092\u89e3\u304f\u3068, $x=\u03b1$(\u91cd\u89e3)$,4\u03b1$\u3068\u306a\u308a\u307e\u3059\u3002\u3057\u305f\u304c\u3063\u3066, $y=f(x)$\u30b0\u30e9\u30d5\u3092\u66f8\u304f\u3068\u4e0b\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002 \u4e09\u6b21\u95a2\u6570\u306e\u30b0\u30e9\u30d5\u304c\u70b9\u5bfe\u79f0\u3067\u3042\u308b\u3053\u3068\u3092\u8003\u3048\u308b\u3068, \u6975\u5024\u3092$2$\u3064\u3082\u3064\u4e09\u6b21\u95a2\u6570\u306e\u30b0\u30e9\u30d5\u306f, \u9577\u65b9\u5f62$8$\u7b49\u5206\u306e\u4e2d\u306b\u53ce\u307e\u308a\u307e\u3059\u3002 \u4eca\u56de\u306e\u5834\u5408\u306f, \u4e0b\u306e\u56f3\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002 <\/p>\n \u66f2\u7dda$y=x^3 \u2212x$\u4e0a\u306e\u70b9$(\u22121, 0)$\u306b\u304a\u3051\u308b\u63a5\u7dda\u3068, \u66f2\u7dda$y=x^3 \u2212x$\u3068\u306e\u5171\u6709\u70b9\u3068\u306e$x$\u5ea7\u6a19\u306f\u4f55\u3067\u3057\u3087\u3046\u3002<\/strong> <\/p>\n \u6b63\u89e3\u306f$x=\u22121, 2$\u3067\u3059\u3002<\/p>\n \u4e09\u6b21\u95a2\u6570\u306e\u30b0\u30e9\u30d5C\u306e\u70b9\u5bfe\u79f0\u306e\u4e2d\u5fc3\u3092P\u3068\u3057, \u70b9A\u306b\u304a\u3051\u308bC\u306e\u63a5\u7dda\u3068C\u306e\u4ea4\u70b9\u306e\u3046\u3061A\u3067\u306a\u3044\u65b9\u3092B\u3068\u3057\u307e\u3059\u3002 \u56f3\u306e\u3088\u3046\u306b,$x$\u5ea7\u6a19\u306e\u5dee\u304c$1 : 2$\u306b\u306a\u308b\u3068\u3044\u3046\u6027\u8cea\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u308c\u306f\u9577\u65b9\u5f62$8$\u7b49\u5206\u306e\u4e2d\u306b\u53ce\u307e\u308b\u3053\u3068\u306e\u62e1\u5f35\u3067\u3059\u3002\u5e73\u884c\u56db\u8fba\u5f62$8$\u7b49\u5206\u306e\u4e2d\u306b\u53ce\u307e\u308a\u307e\u3059\u3002 \u4eca\u56de\u7d39\u4ecb\u3057\u305f\u6027\u8cea\u306f, \u7b54\u3048\u3092\u51fa\u3059\u3060\u3051\u306a\u3089\u6642\u9593\u3082\u304b\u3051\u305a\u306b\u6bd4\u8f03\u7684\u6613\u3057\u3044\u8a08\u7b97\u306e\u307f\u3067\u51fa\u305b\u308b\u306e\u3067\u4fbf\u5229\u3067\u3059\u3002<\/p>\n \u8a18\u8ff0\u8a66\u9a13\u3067\u306f\u3057\u3063\u304b\u308a\u5897\u6e1b\u3092\u8abf\u3079\u305f\u308a,\u65b9\u7a0b\u5f0f\u3092\u89e3\u3044\u305f\u308a\u3059\u308b\u5fc5\u8981\u304c\u3042\u308b\u306e\u3067\u6ce8\u610f\u3067\u3059\u3002 \u305d\u308c\u3067\u306f, \u4eca\u56de\u306f\u3053\u306e\u8fba\u3067\uff01
\n![\"\"](\"https:\/\/www.educational-lounge.com\/wp-content\/uploads\/2022\/12\/001.jpg\")
<\/a><\/p>\n<\/div>\n<\/div>\n
\n<\/a><\/p>\n<\/div>\n<\/div>\n
\n<\/a><\/p>\n<\/div>\n<\/div>\n
\n<\/a><\/a><\/p>\n<\/div>\n<\/div>\n\u4e09\u6b21\u95a2\u6570\u306e\u30af\u3099\u30e9\u30d5\u306e\u5e38\u8b58\u2015\u2015\u89e3\u8aac\u7de8<\/h2>\n
\n<\/a><\/a>
\n<\/strong><\/p>\n<\/div>\n<\/div>\n\u7b2c\uff11\u554f\u306e\u89e3\u8aac<\/span><\/h3>\n
\n$f'(x)$\u306f$x$\u306e2\u6b21\u5f0f\u3068\u306a\u308b\u304b\u3089, \u4e8c\u6b21\u65b9\u7a0b\u5f0f$f'(x)=0$\u306e\u89e3\u306f,<\/span><\/p>\n
\n\u3064\u307e\u308a, $y=f(x)$\u306e\u30b0\u30e9\u30d5\u306e\u6982\u5f62\u3082$3$\u7a2e\u985e\u3067\u3059\u3002
\n<\/a><\/a>
\n\u307e\u305f, \u2460\u306f\u4e00\u6b21\u95a2\u6570, \u2465, \u2466, \u2467\u306f\u56db\u6b21\u95a2\u6570\u306e\u30b0\u30e9\u30d5\u3067\u3059\u3002\u3055\u3089\u306b, \u4e09\u6b21\u95a2\u6570\u306e\u30b0\u30e9\u30d5\u306f\u70b9\u5bfe\u79f0\u306e\u30b0\u30e9\u30d5\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n
\n
\n<\/a><\/p>\n<\/div>\n<\/div>\n\u7b2c2\u554f\u306e\u89e3\u8aac<\/span><\/h3>\n
\n<\/a><\/p>\n
\n
\n<\/a><\/p>\n<\/div>\n<\/div>\n\u7b2c3\u554f\u306e\u89e3\u8aac<\/span><\/h3>\n
\n<\/a><\/p>\n
\n\u7b2c4\u554f\u306e\u89e3\u8aac<\/span><\/h3>\n
\n<\/a><\/p>\n
\n<\/a><\/p>\n
\n<\/a><\/p>\n
\n
\n<\/a><\/p>\n<\/div>\n<\/div>\n\u7b2c5\u554f\u306e\u89e3\u8aac<\/span><\/span><\/h3>\n
\n<\/a><\/p>\n
\n<\/a><\/a>
\n$y=x^3 \u2212x$\u306e\u30b0\u30e9\u30d5\u306f\u7b2c2 \u554f\u3067\u898b\u305f\u3088\u3046\u306b\u539f\u70b9\u5bfe\u79f0\u3067\u3042\u308b\u304b\u3089, \u4eca\u56de\u306f\u4e0b\u306e\u56f3\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002
\n<\/a><\/p>\n\u304a\u308f\u308a\u306b<\/h2>\n
\n\u305f\u3060, \u5171\u901a\u30c6\u30b9\u30c8\u306e\u3088\u3046\u306a\u30de\u30fc\u30af\u30b7\u30fc\u30c8\u5f0f\u306e\u8a66\u9a13\u306a\u3069\u3067\u306f\u5a01\u529b\u3092\u767a\u63ee\u3059\u308b\u3068\u601d\u3044\u307e\u3059\u3002<\/p>\n
\n