{"id":2765,"date":"2020-11-30T17:02:58","date_gmt":"2020-11-30T08:02:58","guid":{"rendered":"https:\/\/hatsudy.com\/jp\/?p=2765"},"modified":"2024-10-16T15:36:29","modified_gmt":"2024-10-16T06:36:29","slug":"quadratic-function","status":"publish","type":"post","link":"https:\/\/hatsudy.com\/jp\/quadratic-function.html","title":{"rendered":"\u4e2d\u5b66\u6570\u5b66\u306e\u4e8c\u6b21\u95a2\u6570\uff1a\u554f\u984c\u306e\u89e3\u304d\u65b9\u306e\u57fa\u672c\u3068\u30b0\u30e9\u30d5\u306e\u66f8\u304d\u65b9"},"content":{"rendered":"\n<p>\u4e2d\u5b66\u6570\u5b66\u3067\u306f\u4e8c\u6b21\u95a2\u6570\u3092\u5b66\u3073\u307e\u3059\u3002\u4e8c\u4e57\u306e\u30b0\u30e9\u30d5\u304c\u4e8c\u6b21\u95a2\u6570\u3067\u3042\u308a\u3001\u30b0\u30e9\u30d5\u306b\u306f\u30ab\u30fc\u30d6\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u30b0\u30e9\u30d5\u3092\u542b\u3080\u6570\u5b66\u3067\u306f\u3001\u4e2d\u5b66\u751f\u3067\u306f\u6700\u521d\u306b\u6bd4\u4f8b\u3092\u5b66\u3073\u307e\u3059\u3002\u6bd4\u4f8b\u3092\u5fdc\u7528\u3055\u305b\u305f\u30b0\u30e9\u30d5\u304c\u4e00\u6b21\u95a2\u6570\u3067\u3059\u3002\u4e00\u6b21\u95a2\u6570\u306e\u3055\u3089\u306a\u308b\u767a\u5c55\u554f\u984c\u304c\u4e8c\u6b21\u95a2\u6570\u3067\u3059\u3002\u4e00\u6b21\u95a2\u6570\u3068\u4e8c\u6b21\u95a2\u6570\u306f\u8003\u3048\u65b9\u304c\u307b\u307c\u540c\u3058\u3067\u3042\u308a\u3001\u9055\u3044\u306f\\(x^2\\)\u304c\u5f0f\u306e\u4e2d\u306b\u3042\u308b\u304b\u3069\u3046\u304b\u3060\u3051\u3067\u3059\u3002<\/p>\n<p>\u305f\u3060\u4e8c\u6b21\u95a2\u6570\u3067\u306f\u3001\u30b0\u30e9\u30d5\u306e\u5f62\u304c\u5927\u304d\u304f\u7570\u306a\u308a\u307e\u3059\u3002\u307e\u305f\u899a\u3048\u306a\u3051\u308c\u3070\u3044\u3051\u306a\u3044\u4e8c\u6b21\u95a2\u6570\u306e\u7279\u5fb4\u3082\u5b58\u5728\u3057\u307e\u3059\u3002<\/p>\n<p>\u3055\u3089\u306b\u4e8c\u6b21\u95a2\u6570\u306e\u554f\u984c\u3067\u306f\u3001\u4e00\u6b21\u95a2\u6570\u3068\u7d44\u307f\u5408\u308f\u305b\u308b\u3053\u3068\u304c\u3088\u304f\u3042\u308a\u307e\u3059\u3002\u305d\u3053\u3067\u3001\u3069\u306e\u3088\u3046\u306b\u3057\u3066\u4e8c\u6b21\u95a2\u6570\u306e\u554f\u984c\u3092\u89e3\u3051\u3070\u3044\u3044\u306e\u304b\u89e3\u8aac\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n<h2>\\(y=ax^2\\)\u306e\u65b9\u7a0b\u5f0f\u304c\u4e8c\u6b21\u95a2\u6570<\/h2>\n<p>\\(x\\)\u306b\u6570\u5b57\u3092\u4ee3\u5165\u3057\u305f\u3068\u304d\u3001\\(y\\)\u306e\u5024\u304c\u660e\u78ba\u306b\u6c7a\u5b9a\u3055\u308c\u308b\u65b9\u7a0b\u5f0f\u304c\u95a2\u6570\u3067\u3059\u3002\u4e00\u6b21\u95a2\u6570\u3067\u306f\u3001\u4f8b\u3048\u3070\u4ee5\u4e0b\u306e\u5f0f\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<ul>\n<li>\\(y=x+2\\)<\/li>\n<\/ul>\n<p>\u3053\u306e\u3088\u3046\u306a\u5f0f\u3067\u306f\u3001\\(x\\)\u304c2\u500d\u306b\u306a\u308b\u3068\u3001\\(y\\)\u306e\u5897\u52a0\u91cf\u30822\u500d\u306b\u306a\u308a\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u3001\\(y\\)\u3068\\(x\\)\u306e\u5024\u306f\u6bd4\u4f8b\u306e\u95a2\u4fc2\u306b\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u4e00\u65b9\u3067\u4e8c\u6b21\u95a2\u6570\u3067\u306f\u3001\u4f8b\u3048\u3070\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u5f0f\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<ul>\n<li>\\(y=x^2\\)<\/li>\n<\/ul>\n<p>\u3053\u306e\u5834\u5408\u3001\\(x\\)\u306e\u5024\u304c2\u500d\u306b\u306a\u308b\u3068\u3001\\(y\\)\u306e\u5024\u306f2<sup>2<\/sup>\u500d\uff084\u500d\uff09\u306b\u306a\u308b\u3053\u3068\u304c\u5206\u304b\u308a\u307e\u3059\u3002\u3064\u307e\u308a\u3001<span 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#ff0000;\">\u653e\u7269\u7dda<\/span>\u3068\u3044\u3044\u307e\u3059\u3002\u7a7a\u4e2d\u306b\u3042\u308b\u7269\u4f53\u306f\u3069\u308c\u3082\u653e\u7269\u7dda\u3092\u63cf\u304f\u3088\u3046\u306b\u306a\u308a\u3001\u4e8c\u6b21\u95a2\u6570\u3068\u540c\u3058\u66f2\u7dda\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<h3>\\(a\\)\u306e\u5024\u3067\u30b0\u30e9\u30d5\u306e\u5f62\u304c\u5909\u308f\u308b<\/h3>\n<p>\u306a\u304a\\(y=ax^2\\)\u306e\u30b0\u30e9\u30d5\u3092\u66f8\u304f\u3068\u304d\u3001\u30b0\u30e9\u30d5\u306e\u5f62\u306f\\(a\\)\u306e\u5024\u306b\u3088\u3063\u3066\u5909\u308f\u308b\u3068\u8003\u3048\u307e\u3057\u3087\u3046\u3002\\(a\\)\u306e\u7d76\u5bfe\u5024\u304c\u5927\u304d\u304f\u306a\u308b\u307b\u3069\u3001\u30b0\u30e9\u30d5\u306f\u6025\u306b\u306a\u308a\u307e\u3059\u3002\u4e00\u65b9\u3067\\(a\\)\u306e\u7d76\u5bfe\u5024\u304c\u5c0f\u3055\u304f\u306a\u308b\u307b\u3069\u3001\u30b0\u30e9\u30d5\u306f\u3086\u308b\u3084\u304b\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u3001\\(a\\)\u306e\u5024\u306b\u3088\u3063\u3066\u30b0\u30e9\u30d5\u306e\u5f62\u304c\u5909\u308f\u308a\u307e\u3059\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-2783\" src=\"https:\/\/hatsudy.com\/jp\/wp-content\/uploads\/2020\/11\/wege12.jpg\" alt=\"\" width=\"600\" height=\"474\" \/><\/p>\n<p>\u30b0\u30e9\u30d5\u304c\u539f\u70b9\\((0,0)\\)\u3092\u901a\u308b\u306e\u306f\u540c\u3058\u3067\u3059\u3002\u307e\u305f\u653e\u7269\u7dda\u306e\u66f2\u7dda\u306b\u306a\u308b\u306e\u3082\u5171\u901a\u3057\u3066\u3044\u307e\u3059\u3002\u9055\u3046\u306e\u306f\u3001\\(a\\)\u306e\u5024\u306b\u3088\u3063\u3066\u30b0\u30e9\u30d5\u306e\u5f62\u304c\u5909\u308f\u308b\u3053\u3068\u3067\u3059\u3002<\/p>\n<h3>\\(a&gt;0\\)\u3067\u4e0b\u306b\u51f8\u306b\u306a\u308a\u3001\\(a&lt;0\\)\u3067\u4e0a\u306b\u51f8\u306b\u306a\u308b<\/h3>\n<p>\u307e\u305f\u3001\u4ed6\u306b\u91cd\u8981\u306a\u30dd\u30a4\u30f3\u30c8\u304c\u3042\u308a\u307e\u3059\u3002\u305d\u308c\u306f\u3001\\(a\\)\u306e\u5024\u304c\u6b63\u306e\u6570\u306a\u306e\u304b\u3001\u305d\u308c\u3068\u3082\u8ca0\u306e\u6570\u306a\u306e\u304b\u306b\u3088\u3063\u3066\u30b0\u30e9\u30d5\u306e\u5411\u304d\u304c\u5909\u308f\u308b\u3053\u3068\u3067\u3059\u3002<\/p>\n<p>\u4e8c\u6b21\u95a2\u6570\u306e\u30b0\u30e9\u30d5\u3067\u306f\u3001\\(a\\)\u304c\u6b63\u306e\u6570\uff08\\(a&gt;0\\)\uff09\u3060\u3068\u4e0b\u306b\u51f8\u306b\u306a\u308a\u307e\u3059\u3002\u4e00\u65b9\u3067\\(a\\)\u304c\u8ca0\u306e\u6570\uff08\\(a&lt;0\\)\uff09\u3060\u3068\u3001\u4e0a\u306b\u51f8\u306b\u306a\u308a\u307e\u3059\u3002\u5177\u4f53\u7684\u306b\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-2786\" src=\"https:\/\/hatsudy.com\/jp\/wp-content\/uploads\/2020\/11\/wege13.jpg\" alt=\"\" width=\"600\" height=\"300\" \/><\/p>\n<p>\u4e8c\u6b21\u95a2\u6570\u3067\u306f\\(x\\)\u306e\u5024\u3092\u4e8c\u4e57\u3057\u307e\u3059\u3002\u305d\u306e\u305f\u3081\\(x\\)\u306e\u5024\u304c\u30d7\u30e9\u30b9\u3067\u3082\u30de\u30a4\u30ca\u30b9\u3067\u3082\u3001\u5fc5\u305a\u7b54\u3048\u306f\u30d7\u30e9\u30b9\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u305f\u3060\u4e8c\u6b21\u95a2\u6570\u3067\u306f\u3001\\(a\\)\u306e\u5024\u3092\u639b\u3051\u307e\u3059\u3002\u305d\u306e\u305f\u3081\\(a\\)\u306e\u5024\u304c\u6b63\u306e\u6570\u3060\u3068\u3001\\(x\\)\u306e\u5024\u304c\u5927\u304d\u304f\u306a\u308b\u307b\u3069\\(y\\)\u306e\u5024\u3082\u5927\u304d\u304f\u306a\u308a\u307e\u3059\u3002\u4e00\u65b9\u3067\\(a\\)\u306e\u5024\u304c\u8ca0\u306e\u6570\u3060\u3068\u3001\\(x\\)\u306e\u5024\u304c\u5927\u304d\u304f\u306a\u308b\u307b\u3069\\(y\\)\u306e\u5024\u306f\u5c0f\u3055\u304f\u306a\u308a\u307e\u3059\u3002<\/p>\n<h2>\u4e8c\u6b21\u95a2\u6570\u3067\u306e\u5909\u5316\u306e\u5272\u5408\u306f\u7570\u306a\u308b<\/h2>\n<p>\u306a\u304a\u4e8c\u6b21\u95a2\u6570\u3067\u306f\u3001\u5909\u5316\u306e\u5272\u5408\u3092\u6c42\u3081\u306a\u3051\u308c\u3070\u3044\u3051\u306a\u3044\u3053\u3068\u304c\u3042\u308a\u307e\u3059\u3002\u4e00\u6b21\u95a2\u6570\u306e\u8a08\u7b97\u3092\u3059\u308b\u3068\u304d\u3001\u5909\u5316\u306e\u5272\u5408\u306f\u975e\u5e38\u306b\u91cd\u8981\u3067\u3059\u3002\u300c\u5909\u5316\u306e\u5272\u5408\uff1d\u50be\u304d\u300d\u3060\u304b\u3089\u3067\u3059\u3002\u5909\u5316\u306e\u5272\u5408\u3092\u8a08\u7b97\u3059\u308b\u3053\u3068\u3067\u3001\u50be\u304d\\(a\\)\u3092\u51fa\u3059\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u305f\u3060\u4e00\u6b21\u95a2\u6570\u3068\u4e8c\u6b21\u95a2\u6570\u3067\u306f\u3001\u5909\u5316\u306e\u5272\u5408\u306b\u5bfe\u3059\u308b\u8003\u3048\u65b9\u304c\u7570\u306a\u308a\u307e\u3059\u3002\u4e00\u6b21\u95a2\u6570\u3067\u306f\u3001\u5909\u5316\u306e\u5272\u5408\u306f\u5e38\u306b\u4e00\u5b9a\u3067\u3059\u3002\u4e00\u65b9\u3067<span style=\"color: #0000ff;\">\u4e8c\u6b21\u95a2\u6570\u3067\u306f\u3001\u5909\u5316\u306e\u5272\u5408\u304c\u5834\u6240\u306b\u3088\u3063\u3066\u5909\u5316\u3057\u307e\u3059\u3002<\/span><\/p>\n<p>\u5909\u5316\u306e\u5272\u5408\u3092\u8a08\u7b97\u3059\u308b\u3068\u304d\u3001\u4ee5\u4e0b\u306e\u516c\u5f0f\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-2788\" src=\"https:\/\/hatsudy.com\/jp\/wp-content\/uploads\/2020\/11\/wege14.jpg\" alt=\"\" width=\"500\" height=\"103\" \/><\/p>\n<p>\u4e00\u6b21\u95a2\u6570\u3067\u306f\u3053\u306e\u516c\u5f0f\u3092\u899a\u3048\u306a\u304f\u3066\u3082\u3044\u3044\u3067\u3059\u3002\u524d\u8ff0\u306e\u901a\u308a\u3001\u5909\u5316\u306e\u5272\u5408\u3068\u50be\u304d\u306f\u610f\u5473\u304c\u540c\u3058\u3060\u304b\u3089\u3067\u3059\u3002\u4e00\u65b9\u3067\u4e8c\u6b21\u95a2\u6570\u3067\u306f\u3069\u3046\u306a\u306e\u3067\u3057\u3087\u3046\u304b\u3002\u4e8c\u6b21\u95a2\u6570\u3067\u3082\u3001\u5909\u5316\u306e\u5272\u5408\u306e\u516c\u5f0f\u3092\u899a\u3048\u308b\u610f\u5473\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n<p><span style=\"color: #0000ff;\">\u5909\u5316\u306e\u5272\u5408\u3068\u306f\u3001\u8981\u306f\u300c\\(x\\)\u306e\u5024\u304c1\u5897\u3048\u305f\u3068\u304d\u3001\\(y\\)\u306e\u5024\u304c\u3044\u304f\u3089\u5897\u3048\u308b\u306e\u304b\u300d\u3092\u6307\u3057\u307e\u3059\u3002<\/span>\u3053\u306e\u5b9a\u7fa9\u3092\u7406\u89e3\u3057\u3066\u3044\u308c\u3070\u3001\u5909\u5316\u306e\u5272\u5408\u306e\u516c\u5f0f\u3092\u899a\u3048\u308b\u5fc5\u8981\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u6bd4\u306e\u6027\u8cea\u3092\u4f7f\u3048\u3070\u3044\u3044\u304b\u3089\u3067\u3059\u3002\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-2795\" src=\"https:\/\/hatsudy.com\/jp\/wp-content\/uploads\/2020\/11\/webft2.jpg\" alt=\"\" width=\"600\" height=\"206\" \/><\/p>\n<p>\u6bd4\u306e\u6027\u8cea\u3092\u5229\u7528\u3059\u308c\u3070\u3001\u5909\u5316\u306e\u5272\u5408\u3092\u51fa\u3059\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<ul>\n<li>\\(x\\)\u306e\u5024\u304c1\u5897\u3048\u305f\u3068\u304d\u3001\\(y\\)\u306e\u5024\u304c2\u5897\u3048\u3066\u3044\u308b\uff1a\u5909\u5316\u306e\u5272\u5408\u306f2<\/li>\n<li>\\(x\\)\u306e\u5024\u304c1\u5897\u3048\u305f\u3068\u304d\u3001\\(y\\)\u306e\u5024\u304c-4\u5897\u3048\u3066\u3044\u308b\uff1a\u5909\u5316\u306e\u5272\u5408\u306f-4<\/li>\n<li>\\(x\\)\u306e\u5024\u304c7\u5897\u3048\u305f\u3068\u304d\u3001\\(y\\)\u306e\u5024\u304c3\u5897\u3048\u3066\u3044\u308b\uff1a\u5909\u5316\u306e\u5272\u5408\u306f\\(\\displaystyle\\frac{3}{7}\\)<\/li>\n<\/ul>\n<p>\u4f8b\u3048\u3070\\(x\\)\u306e\u5024\u304c7\u5897\u3048\u305f\u3068\u304d\u3001\\(y\\)\u306e\u5024\u304c3\u5897\u3048\u3066\u3044\u308b\u5834\u5408\u3001\u6bd4\u306f\\(7:3=1:a\\)\u3067\u3059\u3002\u3053\u308c\u3092\u89e3\u304f\u3068\u3001\\(a=\\displaystyle\\frac{3}{7}\\)\u3067\u3059\u3002\u5229\u7528\u983b\u5ea6\u304c\u4f4e\u304f\u3001\u305d\u3053\u307e\u3067\u91cd\u8981\u3067\u306a\u3044\u516c\u5f0f\u3092\u899a\u3048\u3066\u3082\u78ba\u5b9f\u306b\u5fd8\u308c\u307e\u3059\u3002\u305d\u3046\u3067\u306f\u306a\u304f\u3001\u300c\u306a\u305c\u305d\u3046\u306a\u308b\u306e\u304b\u300d\u306e\u539f\u7406\u539f\u5247\u3092\u7406\u89e3\u3057\u3066\u3001\u516c\u5f0f\u306a\u3057\u306b\u5024\u3092\u51fa\u3055\u306a\u3051\u308c\u3070\u3044\u3051\u307e\u305b\u3093\u3002<\/p>\n<p>\u6570\u5b66\u3067\u306f\u3001\u516c\u5f0f\u3092\u899a\u3048\u306a\u3051\u308c\u3070\u3044\u3051\u306a\u3044\u5834\u9762\u3068\u305d\u3046\u3067\u306a\u3044\u5834\u9762\u304c\u3042\u308a\u307e\u3059\u3002<span style=\"color: #0000ff;\">\u5909\u5316\u306e\u5272\u5408\u306b\u3064\u3044\u3066\u306f\u3001\u516c\u5f0f\u3092\u899a\u3048\u308b\u610f\u5473\u306f\u3042\u308a\u307e\u305b\u3093\u3002<\/span><\/p>\n<p><strong>\u30fb\u4e8c\u6b21\u65b9\u7a0b\u5f0f\u306e\u5909\u5316\u306e\u5272\u5408<\/strong><\/p>\n<p>\u306a\u304a\u524d\u8ff0\u306e\u901a\u308a\u3001\u4e8c\u6b21\u95a2\u6570\u3067\u306f\u5ea7\u6a19\u306b\u3088\u3063\u3066\u5909\u5316\u306e\u5272\u5408\u304c\u5909\u308f\u308a\u307e\u3059\u3002\u3069\u306e\u3088\u3046\u306b\u4e8c\u6b21\u95a2\u6570\u3067\u306e\u5909\u5316\u306e\u5272\u5408\u3092\u8003\u3048\u308c\u3070\u3044\u306e\u3067\u3057\u3087\u3046\u304b\u3002\u4f8b\u3068\u3057\u3066\u3001\\(y=x^2\\)\u306e\u30b0\u30e9\u30d5\u3067\u4ee5\u4e0b\u306e\u3068\u304d\u3001\u5909\u5316\u306e\u5272\u5408\u3092\u8a08\u7b97\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<ul>\n<li>\\(x\\)\u306e\u5024\u304c1\u304b\u30892\u3078\u5909\u5316\u3059\u308b\u3068\u304d<\/li>\n<li>\\(x\\)\u306e\u5024\u304c-3\u304b\u3089-1\u3078\u5909\u5316\u3059\u308b\u3068\u304d<\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-2791\" src=\"https:\/\/hatsudy.com\/jp\/wp-content\/uploads\/2020\/11\/wege16.jpg\" alt=\"\" width=\"503\" height=\"519\" \/><\/p>\n<p>\\(x\\)\u306e\u5024\u304c1\u304b\u30892\u3078\u5909\u5316\u3059\u308b\u3068\u304d\u3001\\(y\\)\u306e\u5024\u306f3\u5897\u3048\u307e\u3059\u3002\\(x\\)\u304c1\u5897\u3048\u308b\u3068\u3001\\(y\\)\u306f3\u5897\u3048\u308b\u305f\u3081\u3001\u5909\u5316\u306e\u5272\u5408\u306f3\u3067\u3059\u3002<\/p>\n<p>\u4e00\u65b9\u3067\\(x\\)\u306e\u5024\u304c-3\u304b\u3089-1\u3078\u5909\u5316\u3059\u308b\u3068\u304d\u3001\\(y\\)\u306e\u5024\u306f-8\u5897\u3048\u307e\u3059\u3002\\(x\\)\u304c2\u5897\u3048\u308b\u3068\u3001\\(y\\)\u306f-8\u5897\u3048\u307e\u3059\u3002\\(2:-8=1:a\\)\u306e\u6bd4\u306b\u306a\u308b\u305f\u3081\u3001\u5909\u5316\u306e\u5272\u5408\u306f-4\u3067\u3059\u3002<\/p>\n<h3>2\u70b9\u3092\u901a\u308b\u4e00\u6b21\u95a2\u6570\u3092\u6c42\u3081\u308b<\/h3>\n<p>\u305d\u308c\u3067\u306f\u3001\u4e8c\u6b21\u95a2\u6570\u3067\u306a\u305c\u5909\u5316\u306e\u5272\u5408\u3092\u6c42\u3081\u308b\u5fc5\u8981\u304c\u3042\u308b\u306e\u3067\u3057\u3087\u3046\u304b\u3002\u305d\u308c\u306f\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u4e8c\u6b21\u95a2\u6570\u3068\u4e00\u6b21\u95a2\u6570\u3092\u7d44\u307f\u5408\u308f\u305b\u305f\u554f\u984c\u3092\u89e3\u304b\u306a\u3051\u308c\u3070\u3044\u3051\u306a\u3044\u304b\u3089\u3067\u3059\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-2797\" src=\"https:\/\/hatsudy.com\/jp\/wp-content\/uploads\/2020\/11\/webft4-1.jpg\" alt=\"\" width=\"400\" height=\"413\" \/><\/p>\n<p>\u4e8c\u6b21\u95a2\u6570\u306e\u5909\u5316\u306e\u5272\u5408\u306f\u5909\u308f\u308b\u3082\u306e\u306e\u3001\u4e00\u6b21\u95a2\u6570\u306e\u5909\u5316\u306e\u5272\u5408\u306f\u5909\u308f\u308a\u307e\u305b\u3093\u3002\u305d\u306e\u305f\u3081<span style=\"color: #0000ff;\">\u4e8c\u6b21\u95a2\u6570\u306b\u3064\u3044\u3066\u30012\u70b9\u306e\u5ea7\u6a19\u3092\u7d50\u3076\u76f4\u7dda\u306b\u3064\u3044\u3066\u306f\u3001\u5909\u5316\u306e\u5272\u5408\u306f\u5e38\u306b\u4e00\u5b9a\u3067\u3059\u3002<\/span>\u50be\u304d\u304c\u5909\u5316\u306e\u5272\u5408\u3060\u304b\u3089\u3067\u3059\u3002<\/p>\n<p>\u4e8c\u6b21\u95a2\u6570\u3067\u5909\u5316\u306e\u5272\u5408\u3092\u6c42\u3081\u308b\u3068\u3044\u3046\u306e\u306f\u3001\u300c2\u3064\u306e\u5ea7\u6a19\u3092\u7d50\u3076\u76f4\u7dda\u306e\u50be\u304d\u3092\u51fa\u3059\u300d\u306e\u3068\u610f\u5473\u304c\u540c\u3058\u3067\u3059\u3002\u53c2\u8003\u307e\u3067\u306b\u3001\u5148\u307b\u3069\u306e\u30b0\u30e9\u30d5\u3067\u306f\\((-1,1)\\)\u3068\\((3,9)\\)\u304c\u4ea4\u70b9\u3067\u3059\u3002\u3064\u307e\u308a\\(x\\)\u304c4\u5897\u3048\u305f\u7d50\u679c\u3001\\(y\\)\u306f8\u5897\u3048\u3066\u3044\u307e\u3059\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-2798\" src=\"https:\/\/hatsudy.com\/jp\/wp-content\/uploads\/2020\/11\/webft5.jpg\" alt=\"\" width=\"400\" height=\"411\" \/><\/p>\n<p>\u300c\\(x\\)\u306e\u5897\u52a0\u91cf\uff1a\\(y\\)\u306e\u5897\u52a0\u91cf\uff1d1\uff1a\\(a\\)\u300d\u306b\u5f53\u3066\u306f\u3081\u308b\u3068\u3001\\(4:8=1:a\\)\u306b\u306a\u308a\u307e\u3059\u3002\u3053\u308c\u3092\u89e3\u304f\u3068\u3001\\(a=2\\)\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\u307e\u305f2\u70b9\u306e\u5ea7\u6a19\u3092\u901a\u308b\u76f4\u7dda\u3092\u78ba\u8a8d\u3059\u308b\u3068\u3001\\((0,3)\\)\u306e\u5ea7\u6a19\u3092\u901a\u3063\u3066\u3044\u308b\u3053\u3068\u304c\u5206\u304b\u308a\u307e\u3059\u3002\u3064\u307e\u308a\u3001\u5207\u7247\u306f3\u3067\u3059\u3002\u305d\u306e\u305f\u3081\u30012\u70b9\u306e\u4ea4\u70b9\u3092\u901a\u308b\u76f4\u7dda\u306e\u4e00\u6b21\u95a2\u6570\u306f\u4ee5\u4e0b\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<ul>\n<li>\\(y=2x+3\\)<\/li>\n<\/ul>\n<p>\u3053\u3046\u3057\u3066\u3001\u4e8c\u6b21\u95a2\u6570\u306e2\u3064\u306e\u5ea7\u6a19\u3092\u7d50\u3076\u76f4\u7dda\u306b\u3064\u3044\u3066\u3001\u4e00\u6b21\u95a2\u6570\u3092\u5c0e\u304d\u51fa\u3059\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u4e8c\u6b21\u95a2\u6570\u306e\u767a\u5c55\u554f\u984c\u3068\u3057\u3066\u3001\u3053\u3046\u3057\u305f\u6570\u5b66\u306e\u8a08\u7b97\u554f\u984c\u304c\u983b\u7e41\u306b\u51fa\u3055\u308c\u308b\u305f\u3081\u3001\u89e3\u3051\u308b\u3088\u3046\u306b\u3057\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n<h2>\u7df4\u7fd2\u554f\u984c\uff1a\u4e8c\u6b21\u95a2\u6570\u306e\u30b0\u30e9\u30d5\u306e\u554f\u984c<\/h2>\n<p><strong>Q1<\/strong>. \u6b21\u306e\u554f\u984c\u3092\u89e3\u304d\u307e\u3057\u3087\u3046<\/p>\n<p>\\(y=ax^2\\)\u306e\u30b0\u30e9\u30d5(1)\u3068\\(y=ax+b\\)\u306e\u30b0\u30e9\u30d5(2)\u304c\u3042\u308a\u307e\u3059\u3002\u539f\u70b9\u3092O\u3001(1)\u3068(2)\u306e\u4ea4\u70b9\u3092A\u3001B\u3068\u3057\u307e\u3059\u3002A\u306e\\(x\\)\u5ea7\u6a19\u306f-2\u3001B\u306e\\(x\\)\u5ea7\u6a19\u306f6\u3067\u3059\u3002\u307e\u305f\u3001(2)\u306e\u76f4\u7dda\u3068\\(x\\)\u5ea7\u6a19\u3068\u306e\u4ea4\u70b9\u3092C\u3068\u3057\u307e\u3059\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-2799\" src=\"https:\/\/hatsudy.com\/jp\/wp-content\/uploads\/2020\/11\/webft6.jpg\" alt=\"\" width=\"498\" height=\"432\" \/><\/p>\n<ol style=\"list-style-type: lower-alpha;\">\n<li>(1)\u306e\u30b0\u30e9\u30d5\u306b\u3064\u3044\u3066\u3001\\(x\\)\u306e\u5024\u304c-6\u304b\u3089-2\u306b\u5897\u52a0\u3057\u305f\u3068\u304d\u3001\\(y\\)\u306e\u5024\u306f-16\u5897\u3048\u307e\u3057\u305f\u3002\\(a\\)\u306e\u5024\u3092\u6c42\u3081\u307e\u3057\u3087\u3046<\/li>\n<li>(2)\u306e\u76f4\u7dda\u306e\u5f0f\u3092\u6c42\u3081\u307e\u3057\u3087\u3046<\/li>\n<li>\u25b3AOB\u306e\u9762\u7a4d\u3092\u6c42\u3081\u307e\u3057\u3087\u3046<\/li>\n<li>(1)\u306e\u30b0\u30e9\u30d5\u4e0a\u306b\u70b9D\u3092\u53d6\u308a\u307e\u3059\u3002\u25b3COD\u306e\u9762\u7a4d\u304c27\u3068\u306a\u308b\u3068\u304d\u3001\u70b9D\u306e\\(x\\)\u5ea7\u6a19\u3092\u6c42\u3081\u307e\u3057\u3087\u3046<\/li>\n<\/ol>\n<p><strong>A1.<\/strong>\u00a0\u89e3\u7b54<\/p>\n<p>\u4e8c\u6b21\u95a2\u6570\u306e\u554f\u984c\u3067\u306f\u3001\u4e8c\u6b21\u95a2\u6570\u306b\u95a2\u3059\u308b\u554f\u984c\u3060\u3051\u304c\u51fa\u3055\u308c\u308b\u3068\u306f\u9650\u308a\u307e\u305b\u3093\u3002\u3053\u306e\u554f\u984c\u306e\u3088\u3046\u306b\u3001\u4e8c\u6b21\u95a2\u6570\u3068\u95a2\u9023\u3055\u305b\u305f\u4e00\u6b21\u95a2\u6570\u3084\u9023\u7acb\u65b9\u7a0b\u5f0f\u3001\u56f3\u5f62\u306a\u3069\u591a\u304f\u306e\u554f\u984c\u306e\u8907\u5408\u554f\u984c\u3068\u306a\u308b\u306e\u306f\u666e\u901a\u3067\u3059\u3002<\/p>\n<p><strong>(a)<\/strong><\/p>\n<p>\u5909\u5316\u306e\u5272\u5408\u304b\u3089\u4e8c\u6b21\u95a2\u6570\u306e\u5f0f\u3092\u51fa\u3059\u305f\u3081\u306b\u306f\u3069\u3046\u3059\u308c\u3070\u3044\u3044\u306e\u3067\u3057\u3087\u3046\u304b\u3002\u3053\u308c\u306b\u3064\u3044\u3066\u3001\\(x\\)\u3068\\(y\\)\u306e\u5897\u52a0\u91cf\u3092\u8003\u3048\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>\\(x\\)\u306e\u5024\u304c-6\u304b\u3089-2\u306b\u5897\u52a0\u3057\u305f\u3068\u304d\u3001\\(x\\)\u306e\u5024\u306f4\u5897\u3048\u3066\u3044\u307e\u3059\u3002\u3053\u306e\u3068\u304d\u3001\\(y\\)\u306e\u5024\u306f\u3044\u304f\u3089\u5897\u3048\u3066\u3044\u308b\u3067\u3057\u3087\u3046\u304b\u3002\\(y=ax^2\\)\u306e\u5f0f\u306b\u4ee3\u5165\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>\\(x\\)\u306e\u5024\u304c-6\u306e\u3068\u304d\u3001\\(y=a\u00d7(-6)^2=36a\\)\u3067\u3059\u3002\\(x\\)\u306e\u5024\u304c-2\u306e\u3068\u304d\u3001\\(y=a\u00d7(-2)^2=4a\\)\u3067\u3059\u300236a\u304b\u30894a\u306b\u306a\u3063\u3066\u3044\u308b\u305f\u3081\u3001\\(y\\)\u306f-32a\u5897\u3048\u3066\u3044\u307e\u3059\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-2801\" src=\"https:\/\/hatsudy.com\/jp\/wp-content\/uploads\/2020\/11\/webft7.jpg\" alt=\"\" width=\"502\" height=\"434\" \/><\/p>\n<p>\\(y\\)\u306e\u5909\u5316\u91cf\u306f-16\u3068\u65e2\u306b\u5206\u304b\u3063\u3066\u3044\u308b\u305f\u3081\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u8a08\u7b97\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\\(-32a=-16\\)<\/p>\n<p>\\(a=\\displaystyle\\frac{-16}{-32}\\)<\/p>\n<p>\\(a=\\displaystyle\\frac{1}{2}\\)<\/p>\n<p>\u3053\u3046\u3057\u3066\u3001(1)\u306e\u95a2\u6570\u306f\\(y=\\displaystyle\\frac{1}{2}x^2\\)\u3068\u5206\u304b\u308a\u307e\u3059\u3002<\/p>\n<p><strong>(b)<\/strong><\/p>\n<p>\\(y=\\displaystyle\\frac{1}{2}x^2\\)\u306a\u306e\u3067\u3001A\u3068B\u306e\u5ea7\u6a19\u304c\u5206\u304b\u308a\u307e\u3059\u3002\\(x\\)\u306e\u5024\u3092\u4ee3\u5165\u3059\u308b\u3053\u3068\u3067\u3001\u305d\u308c\u305e\u308c\u4ee5\u4e0b\u306e\u5ea7\u6a19\u306b\u306a\u308b\u3068\u5206\u304b\u308a\u307e\u3059\u3002<\/p>\n<ul>\n<li>A\\((-2,2)\\)<\/li>\n<li>B\\((6,18)\\)<\/li>\n<\/ul>\n<p>2\u3064\u306e\u5ea7\u6a19\u304c\u5206\u304b\u3063\u3066\u3044\u308b\u5834\u5408\u3001\u9023\u7acb\u65b9\u7a0b\u5f0f\u306b\u3088\u3063\u3066\u4e00\u6b21\u65b9\u7a0b\u5f0f\u3092\u89e3\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3064\u307e\u308a\u3001(2)\u306e\u5f0f\u304c\u5206\u304b\u308a\u307e\u3059\u3002\\(y=ax+b\\)\u306b\u4ee3\u5165\u3059\u308b\u3053\u3068\u3067\u3001\u4ee5\u4e0b\u306e\u9023\u7acb\u65b9\u7a0b\u5f0f\u3092\u89e3\u304f\u306e\u3067\u3059\u3002<\/p>\n<p>\\(\\begin{eqnarray} \\left\\{\\begin{array}{l}2=&#8211;2a+b\\\\18=6a+b\\end{array}\\right.\\end{eqnarray}\\)<\/p>\n<p>\u3053\u306e\u9023\u7acb\u65b9\u7a0b\u5f0f\u3092\u89e3\u304f\u3053\u3068\u306b\u3088\u3063\u3066\u3001\u4e00\u6b21\u95a2\u6570\u306e\u5f0f\u3092\u51fa\u305b\u307e\u3059\u3002<\/p>\n<p>\u305f\u3060\u3001\u3082\u3046\u4e00\u3064\u306e\u65b9\u6cd5\u306b\u3088\u3063\u3066(2)\u306e\u5f0f\u3092\u51fa\u3059\u3053\u3068\u3082\u53ef\u80fd\u3067\u3059\u3002\u305d\u308c\u306f\u3001\u5909\u5316\u306e\u5272\u5408\u3092\u4f7f\u3046\u65b9\u6cd5\u3067\u3059\u3002\u4e8c\u6b21\u95a2\u6570\u3067\u5909\u5316\u306e\u5272\u5408\u306b\u3064\u3044\u3066\u5b66\u3093\u3060\u305f\u3081\u3001\u3053\u306e\u554f\u984c\u3067\u306f\u5909\u5316\u306e\u5272\u5408\u3092\u5229\u7528\u3057\u3066(2)\u306e\u5f0f\u3092\u51fa\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>\u70b9A\u3068\u70b9B\u3092\u6bd4\u3079\u305f\u3068\u304d\u3001\u5909\u5316\u306e\u5272\u5408\u306f\u3044\u304f\u3089\u3067\u3057\u3087\u3046\u304b\u3002A\\((-2,2)\\)\u304b\u3089B\\((6,18)\\)\u306b\u79fb\u52d5\u3059\u308b\u3068\u304d\u3001\\(x\\)\u306e\u5024\u306f8\u5897\u3048\u3001\\(y\\)\u306e\u5024\u306f16\u5897\u3048\u3066\u3044\u307e\u3059\u3002\u5909\u5316\u306e\u5272\u5408\u306f\\(x\\)\u306e\u5024\u304c1\u5897\u3048\u308b\u3068\u304d\u3001\\(y\\)\u306e\u5024\u304c\u3044\u304f\u3089\u5897\u3048\u308b\u306e\u304b\u3092\u8868\u3057\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u3001\u4ee5\u4e0b\u306e\u6bd4\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<ul>\n<li>\\(8:16=1:a\\)<\/li>\n<\/ul>\n<p>\u6bd4\u306e\u6027\u8cea\u3092\u5229\u7528\u3059\u308b\u3068\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u8a08\u7b97\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\\(16=8a\\)<\/p>\n<p>\\(a=2\\)<\/p>\n<p>\u3053\u3046\u3057\u3066\u3001(2)\u306e\u4e00\u6b21\u95a2\u6570\u306e\u50be\u304d\uff08\u5909\u5316\u306e\u5272\u5408\uff09\u306f2\u3068\u5206\u304b\u308a\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u3001\u4e00\u6b21\u95a2\u6570\u306e\u5f0f\u306f\\(y=2x+b\\)\u3067\u3059\u3002<\/p>\n<p>\u305d\u306e\u5f8c\u3001A\\((-2,2)\\)\u307e\u305f\u306fB\\((6,18)\\)\u3092\u4ee3\u5165\u3059\u308b\u3053\u3068\u3067\u5207\u7247\u3092\u51fa\u3057\u307e\u3057\u3087\u3046\u3002\u4f8b\u3048\u3070\u3001\\((6,18)\\)\u3092\u4ee3\u5165\u3059\u308b\u3068\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p>\\(18=2\u00d76+b\\)<\/p>\n<p>\\(18=12+b\\)<\/p>\n<p>\\(b=6\\)<\/p>\n<p>\u3053\u3046\u3057\u3066\u3001(2)\u306e\u4e00\u6b21\u95a2\u6570\u306f\\(y=2x+6\\)\u3068\u5206\u304b\u308a\u307e\u3059\u3002<\/p>\n<p><strong>(c)<\/strong><\/p>\n<p>\u25b3AOB\u306e\u9762\u7a4d\u306f\u3069\u306e\u3088\u3046\u306b\u8a08\u7b97\u3059\u308c\u3070\u3044\u3044\u306e\u3067\u3057\u3087\u3046\u304b\u3002(2)\u306e\u5207\u7247\uff08\\(y\\)\u5ea7\u6a19\u3068\u306e\u4ea4\u70b9\uff09\u3092P\u3068\u3059\u308b\u3068\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308b\u3053\u3068\u304c\u5206\u304b\u308a\u307e\u3059\u3002<\/p>\n<ul>\n<li>\\(\u25b3AOB=\u25b3AOP+\u25b3BOP\\)<\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-2802\" src=\"https:\/\/hatsudy.com\/jp\/wp-content\/uploads\/2020\/11\/webft8.jpg\" alt=\"\" width=\"501\" height=\"434\" \/><\/p>\n<p>\u305d\u3053\u3067\u3001\u25b3AOP\u3068\u25b3BOP\u306e\u9762\u7a4d\u3092\u6c42\u3081\u307e\u3057\u3087\u3046\u3002(2)\u306e\u5f0f\u306f\\(y=2x+6\\)\u306a\u306e\u3067\u3001P\u306e\u5ea7\u6a19\u306f\\((0,6)\\)\u3067\u3059\u3002\u3064\u307e\u308a\u3001\u4e09\u89d2\u5f62\u306e\u305f\u3066\uff08\u7dda\u5206PO\uff09\u306e\u9577\u3055\u306f6\u3067\u3059\u3002<\/p>\n<p>\u4e00\u65b9\u3067A\u306e\\(x\\)\u5ea7\u6a19\u306f-2\u306a\u306e\u3067\u3001\u25b3AOP\u306e\u6a2a\u306e\u9577\u3055\u306f2\u3067\u3059\u3002B\u306e\\(x\\)\u5ea7\u6a19\u306f6\u306a\u306e\u3067\u3001\u25b3BOP\u306e\u6a2a\u306e\u9577\u3055\u306f6\u3067\u3059\u3002\u305d\u306e\u305f\u3081\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u305d\u308c\u305e\u308c\u306e\u9762\u7a4d\u3092\u51fa\u305b\u307e\u3059\u3002<\/p>\n<ul>\n<li>\u25b3AOP\u306e\u9762\u7a4d\uff1a\\(6\u00d72\u00d7\\displaystyle\\frac{1}{2}=6\\)<\/li>\n<li>\u25b3BOP\u306e\u9762\u7a4d\uff1a\\(6\u00d76\u00d7\\displaystyle\\frac{1}{2}=18\\)<\/li>\n<\/ul>\n<p>\u305d\u308c\u305e\u308c\u306e\u4e09\u89d2\u5f62\u306e\u9762\u7a4d\u3092\u8db3\u3059\u3068\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u7b54\u3048\u304c\u3067\u307e\u3059\u3002<\/p>\n<ul>\n<li>\\(\u25b3AOB=6+18=24\\)<\/li>\n<\/ul>\n<p><strong>(d)<\/strong><\/p>\n<p>(1)\u306e\u4e0a\u306b\u70b9D\u304c\u3042\u308b\u5834\u5408\u3001\u25b3COD\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-2804\" src=\"https:\/\/hatsudy.com\/jp\/wp-content\/uploads\/2020\/11\/webft10.jpg\" alt=\"\" width=\"502\" height=\"444\" \/><\/p>\n<p>(2)\u306e\u4e00\u6b21\u95a2\u6570\u306f\\(y=2x+6\\)\u3067\u3059\u3002\u305d\u306e\u305f\u3081\u3001\\(x\\)\u8ef8\u3068\u306e\u4ea4\u70b9\u306f\\(y=0\\)\u3092\u4ee3\u5165\u3059\u308b\u3053\u3068\u3067\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u8a08\u7b97\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\\(0=2x+6\\)<\/p>\n<p>\\(-2x=6\\)<\/p>\n<p>\\(x=-3\\)<\/p>\n<p>\u70b9C\u306e\u5ea7\u6a19\u306f\\((-3,0)\\)\u3067\u3059\u3002\u3064\u307e\u308a\u3001CO\u306e\u9577\u3055\u306f3\u3067\u3059\u3002\u4e00\u65b9\u3067\u25b3COD\u306e\u305f\u3066\u306e\u9577\u3055\u306f\u3044\u304f\u3089\u3067\u3057\u3087\u3046\u304b\u3002(1)\u306e\u4e8c\u6b21\u95a2\u6570\u306f\\(y=\\displaystyle\\frac{1}{2}x^2\\)\u3067\u3059\u3002\u305d\u306e\u305f\u3081\u70b9D\u306e\u5ea7\u6a19\u306f\\((x,\\displaystyle\\frac{1}{2}x^2)\\)\u3067\u3059\u3002\u3064\u307e\u308a\u3001\u305f\u3066\u306e\u9577\u3055\u306f\\(\\displaystyle\\frac{1}{2}x^2\\)\u3067\u3059\u3002<\/p>\n<p>\u25b3COD\u306e\u9762\u7a4d\u306f27\u3067\u3059\u3002\u4e09\u89d2\u5f62\u306e\u9762\u7a4d\u306e\u516c\u5f0f\u306b\u5f53\u3066\u306f\u3081\u308b\u3068\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u8a08\u7b97\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\\(3\u00d7\\displaystyle\\frac{1}{2}x^2\u00d7\\displaystyle\\frac{1}{2}=27\\)<\/p>\n<p>\\(x^2=27\u00d7\\displaystyle\\frac{4}{3}\\)<\/p>\n<p>\\(x^2=36\\)<\/p>\n<p>\\(x=-6,x=6\\)<\/p>\n<p>\u3053\u3046\u3057\u3066\\(x=-6\\)\u307e\u305f\u306f\\(x=6\\)\u306e\u3068\u304d\u3001\u25b3COD\u306e\u9762\u7a4d\u304c27\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<h2>\u4e8c\u6b21\u95a2\u6570\u306e\u30b0\u30e9\u30d5\u3092\u8aad\u307f\u3001\u65b9\u7a0b\u5f0f\u3092\u89e3\u304f<\/h2>\n<p>\u4e2d\u5b66\u6570\u5b66\u3067\u5b66\u3076\u4e8c\u6b21\u95a2\u6570\u306f\u4e00\u6b21\u95a2\u6570\u3068\u6027\u8cea\u304c\u4f3c\u3066\u3044\u307e\u3059\u3002\u305f\u3060\u3001\u899a\u3048\u308b\u3053\u3068\u306f\u305d\u308c\u306a\u308a\u306b\u591a\u304f\u3001\u653e\u7269\u7dda\u306e\u6982\u5ff5\u3092\u7406\u89e3\u3057\u306a\u3051\u308c\u3070\u3044\u3051\u307e\u305b\u3093\u3002<\/p>\n<p>\u307e\u305f\u4e8c\u6b21\u95a2\u6570\u306e\u554f\u984c\u3092\u89e3\u304f\u5834\u5408\u3001\u4e8c\u6b21\u95a2\u6570\u306b\u95a2\u3059\u308b\u3053\u3068\u3060\u3051\u3092\u554f\u308f\u308c\u308b\u3068\u306f\u9650\u308a\u307e\u305b\u3093\u3002\u4e00\u6b21\u65b9\u7a0b\u5f0f\u3084\u9023\u7acb\u65b9\u7a0b\u5f0f\u3001\u4e00\u6b21\u95a2\u6570\u3001\u56f3\u5f62\u3092\u542b\u3081\u305f\u8907\u5408\u554f\u984c\u306b\u306a\u308b\u3053\u3068\u304c\u591a\u3044\u3067\u3059\u3002\u305d\u3053\u3067\u3001\u4e8c\u6b21\u95a2\u6570\u306e\u6027\u8cea\u3092\u4f7f\u3044\u306a\u304c\u3089\u554f\u984c\u3092\u89e3\u3051\u308b\u3088\u3046\u306b\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>\u7279\u306b\u4e8c\u6b21\u95a2\u6570\u3067\u91cd\u8981\u306b\u306a\u308b\u306e\u304c\u3001\\(a\\)\u306e\u5024\u3068\u5909\u5316\u306e\u5272\u5408\u3067\u3059\u3002\\(a\\)\u306e\u5024\u306b\u3088\u3063\u3066\u3001\u4e8c\u6b21\u95a2\u6570\u306e\u30b0\u30e9\u30d5\u306e\u5f62\u304c\u5909\u308f\u308a\u307e\u3059\u3002\u307e\u305f\u5909\u5316\u306e\u5272\u5408\u3092\u8a08\u7b97\u3059\u308b\u3053\u3068\u3067\u30012\u3064\u306e\u5ea7\u6a19\u3092\u901a\u308b\u76f4\u7dda\u306e\u50be\u304d\u3092\u51fa\u3059\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u4e16\u306e\u4e2d\u306e\u81ea\u7136\u73fe\u8c61\u3067\u4e8c\u6b21\u95a2\u6570\u306b\u306a\u3063\u3066\u3044\u308b\u3053\u3068\u306f\u591a\u3044\u3067\u3059\u3002\u4e8c\u6b21\u95a2\u6570\u306e\u6027\u8cea\u3092\u5b66\u3073\u3001\u30b0\u30e9\u30d5\u306e\u66f8\u304d\u65b9\u3084\u554f\u984c\u306e\u89e3\u304d\u65b9\u3092\u7406\u89e3\u3059\u308b\u3088\u3046\u306b\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e2d\u5b66\u6570\u5b66\u3067\u306f\u4e8c\u6b21\u95a2\u6570\u3092\u5b66\u3073\u307e\u3059\u3002\u4e8c\u4e57\u306e\u30b0\u30e9\u30d5\u304c\u4e8c\u6b21\u95a2\u6570\u3067\u3042\u308a\u3001\u30b0\u30e9\u30d5\u306b\u306f\u30ab\u30fc\u30d6\u304c\u3042\u308a\u307e\u3059\u3002 \u30b0\u30e9\u30d5\u3092\u542b\u3080\u6570\u5b66\u3067\u306f\u3001\u4e2d\u5b66\u751f\u3067\u306f\u6700\u521d\u306b\u6bd4\u4f8b\u3092\u5b66\u3073\u307e\u3059\u3002\u6bd4\u4f8b\u3092\u5fdc\u7528\u3055\u305b\u305f\u30b0\u30e9\u30d5\u304c\u4e00\u6b21\u95a2\u6570\u3067\u3059\u3002\u4e00\u6b21\u95a2\u6570\u306e\u3055\u3089\u306a\u308b\u767a\u5c55\u554f\u984c\u304c\u4e8c\u6b21\u95a2\u6570 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":2805,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":{"0":"post-2765","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-j-math"},"_links":{"self":[{"href":"https:\/\/hatsudy.com\/jp\/wp-json\/wp\/v2\/posts\/2765","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hatsudy.com\/jp\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/hatsudy.com\/jp\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/hatsudy.com\/jp\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/hatsudy.com\/jp\/wp-json\/wp\/v2\/comments?post=2765"}],"version-history":[{"count":15,"href":"https:\/\/hatsudy.com\/jp\/wp-json\/wp\/v2\/posts\/2765\/revisions"}],"predecessor-version":[{"id":12794,"href":"https:\/\/hatsudy.com\/jp\/wp-json\/wp\/v2\/posts\/2765\/revisions\/12794"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/hatsudy.com\/jp\/wp-json\/wp\/v2\/media\/2805"}],"wp:attachment":[{"href":"https:\/\/hatsudy.com\/jp\/wp-json\/wp\/v2\/media?parent=2765"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hatsudy.com\/jp\/wp-json\/wp\/v2\/categories?post=2765"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hatsudy.com\/jp\/wp-json\/wp\/v2\/tags?post=2765"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}