{"id":12607,"date":"2023-02-06T23:32:09","date_gmt":"2023-02-06T14:32:09","guid":{"rendered":"https:\/\/hatsudy.com\/jp\/?p=12607"},"modified":"2023-02-13T01:29:14","modified_gmt":"2023-02-12T16:29:14","slug":"inverse-function","status":"publish","type":"post","link":"https:\/\/hatsudy.com\/jp\/inverse-function.html","title":{"rendered":"\u9006\u95a2\u6570\u30fb\u5408\u6210\u95a2\u6570\uff1a\u5f0f\u306e\u4f5c\u308a\u65b9\u3084\u610f\u5473\u3001\u6027\u8cea"},"content":{"rendered":"\n<p>\u95a2\u6570\u3092\u5229\u7528\u3059\u308b\u3053\u3068\u306b\u3088\u308a\u3001\u7279\u5b9a\u306e\u5024\u3092\u5f97\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3053\u306e\u3068\u304d\u3001\u95a2\u6570\u306b\u306f\u9006\u95a2\u6570\u3084\u5408\u6210\u95a2\u6570\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<p>\u9006\u95a2\u6570\u3068\u5408\u6210\u95a2\u6570\u306e\u6982\u5ff5\u306f\u96e3\u3057\u304f\u3042\u308a\u307e\u305b\u3093\u3002\\(x\\)\u3068\\(y\\)\u306e\u5f0f\u3092\u53cd\u5bfe\u306b\u3059\u308b\u3068\u9006\u95a2\u6570\u306b\u306a\u308a\u307e\u3059\u3002\u307e\u305f\u30012\u3064\u306e\u95a2\u6570\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u3068\u5408\u6210\u95a2\u6570\u306b\u306a\u308a\u307e\u3059\u3002\u305d\u3053\u3067\u3001\u95a2\u6570\u3092\u9006\u95a2\u6570\u3084\u5408\u6210\u95a2\u6570\u3078\u5909\u5f62\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>\u306a\u304a\u3001\u9006\u95a2\u6570\u3068\u5408\u6210\u95a2\u6570\u306f\u95a2\u4fc2\u3057\u3066\u3044\u307e\u3059\u3002\u5408\u6210\u95a2\u6570\u306e\u6027\u8cea\u3092\u5b66\u3076\u3068\u304d\u3001\u9006\u95a2\u6570\u3092\u5229\u7528\u3059\u308b\u306e\u3067\u3059\u3002\u305d\u306e\u305f\u3081\u3001\u9006\u95a2\u6570\u3068\u5408\u6210\u95a2\u6570\u3092\u540c\u6642\u306b\u5b66\u3070\u306a\u3051\u308c\u3070\u3044\u3051\u307e\u305b\u3093\u3002<\/p>\n<p>\u305d\u308c\u3067\u306f\u3001\u9006\u95a2\u6570\u3068\u5408\u6210\u95a2\u6570\u3092\u5229\u7528\u3057\u3066\u3069\u306e\u3088\u3046\u306b\u8a08\u7b97\u3059\u308c\u3070\u3044\u3044\u306e\u3067\u3057\u3087\u3046\u304b\u3002\u9006\u95a2\u6570\u3068\u5408\u6210\u95a2\u6570\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n<h2>\\(y\\)\u306e\u5024\u3092\u6c7a\u3081\u308b\u3068\\(x\\)\u306e\u5024\u304c\u6c7a\u307e\u308b\u9006\u95a2\u6570<\/h2>\n<p>\\(x\\)\u306e\u5024\u304c\u6c7a\u307e\u308b\u3068\u3001\u81ea\u52d5\u7684\u306b\\(y\\)\u306e\u5024\u304c\u6c7a\u307e\u308b\u5834\u5408\u3001\u305d\u306e\u5f0f\u3092\u95a2\u6570\u3068\u3044\u3044\u307e\u3059\u3002\u4f8b\u3048\u3070\\(y=2x\\)\u306f\u95a2\u6570\u3067\u3042\u308a\u3001\\(x\\)\u306e\u5024\u304c\u6c7a\u307e\u308b\u3068\\(y\\)\u306e\u5024\u304c\u6c7a\u307e\u308a\u307e\u3059\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/hatsudy.com\/jp\/wp-content\/uploads\/2022\/03\/rehr1.jpg\" alt=\"\" width=\"571\" height=\"257\" class=\"aligncenter size-full wp-image-4740\" \/><\/p>\n<p>\u4e00\u65b9\u3001\u4f8b\u3048\u3070\\(x^2+y^2=25\\)\u306f\u95a2\u6570\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\\(x=3\\)\u306e\u5834\u5408\u3001\\(y=\u00b14\\)\u3067\u3042\u308a\u3001\u4e00\u3064\u306e\u7b54\u3048\u3092\u5f97\u3089\u308c\u308b\u308f\u3051\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002<span style=\"color: #0000ff;\">\\(x\\)\u306e\u5024\u304c\u6c7a\u307e\u308b\u3068\u3001\\(y\\)\u306e\u5024\u304c\u4e00\u3064\u3060\u3051\u6c7a\u307e\u308b\u306e\u304c\u95a2\u6570\u306e\u6761\u4ef6\u3067\u3059\u3002<\/span><\/p>\n<p>\u5148\u307b\u3069\u306e\u4f8b\u304c\u5186\u95a2\u6570\u3067\u306f\u306a\u304f\u3001\u5186\u306e\u65b9\u7a0b\u5f0f\u3068\u547c\u3070\u308c\u3066\u3044\u308b\u306e\u306f\u3001\u4e00\u3064\u306e\\(x\\)\u3068\u4e00\u3064\u306e\\(y\\)\u304c\u5bfe\u5fdc\u3057\u3066\u3044\u306a\u3044\u304b\u3089\u306a\u306e\u3067\u3059\u3002<\/p>\n<p>\u306a\u304a\u95a2\u6570\u3067\u306f\u4e00\u3064\u306e\u5024\u304c\u660e\u78ba\u306b\u6c7a\u307e\u308b\u305f\u3081\u3001\u53cd\u5bfe\u306e\u5834\u5408\u306b\u3064\u3044\u3066\u3082\u3044\u3048\u307e\u3059\u3002\u3064\u307e\u308a\u3001\\(y\\)\u306e\u5024\u3092\u6c7a\u3081\u308b\u3068\\(x\\)\u306e\u5024\u304c\u6c7a\u307e\u308a\u307e\u3059\u3002\u3053\u308c\u3092\u9006\u95a2\u6570\u3068\u3044\u3044\u307e\u3059\u3002\u95a2\u6570\u3067\u3042\u308b\u5834\u5408\u3001\u9006\u95a2\u6570\u3082\u6210\u308a\u7acb\u3064\u30b1\u30fc\u30b9\u304c\u591a\u3044\u306e\u3067\u3059\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/hatsudy.com\/jp\/wp-content\/uploads\/2023\/02\/pgje3.jpg\" alt=\"\" width=\"559\" height=\"266\" class=\"aligncenter size-full wp-image-12696\" \/><\/p>\n<p>\u95a2\u6570\\(f(x)\\)\u306b\u5bfe\u3057\u3066\u3001\u9006\u95a2\u6570\u3092\\(f^{-1}(x)\\)\u3068\u8868\u3057\u307e\u3059\u3002<\/p>\n<h3>\u9006\u95a2\u6570\u3092\u4f5c\u308b\u65b9\u6cd5\u3068\u6761\u4ef6<\/h3>\n<p>\u305d\u308c\u3067\u306f\u3001\u9006\u95a2\u6570\u3092\u4f5c\u308c\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u3087\u3046\u3002\u8003\u3048\u65b9\u306f\u7c21\u5358\u3067\u3042\u308a\u3001\\(y=&#8230;\\)\u306e\u5f0f\u3092\\(x=&#8230;\\)\u306e\u5f0f\u3078\u5909\u5f62\u3059\u308c\u3070\u3044\u3044\u3067\u3059\u3002\u305d\u306e\u5f8c\u3001\\(x\\)\u3068\\(y\\)\u3092\u5165\u308c\u66ff\u3048\u307e\u3057\u3087\u3046\u3002\u4ee5\u4e0b\u306e\u554f\u984c\u306e\u7b54\u3048\u306f\u4f55\u3067\u3057\u3087\u3046\u304b\u3002<\/p>\n<ul>\n<li>\\(y=2x+4\\)\u306e\u9006\u95a2\u6570\u3092\u6c42\u3081\u307e\u3057\u3087\u3046\u3002<\/li>\n<\/ul>\n<p>\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u5f0f\u3092\u5909\u5f62\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>\\(y=2x+4\\)<\/p>\n<p>\\(2x=y-4\\)<\/p>\n<p>\\(x=\\displaystyle\\frac{y}{2}-2\\)<\/p>\n<p>\u6b21\u306b\u3001\\(x\\)\u3068\\(y\\)\u3092\u5165\u308c\u66ff\u3048\u308b\u3068\\(y=\\displaystyle\\frac{x}{2}-2\\)\u3068\u306a\u308a\u307e\u3059\u3002\u3053\u3046\u3057\u3066\u3001\u9006\u95a2\u6570\u3092\u4f5c\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3057\u305f\u3002<\/p>\n<p>\u306a\u304a\u3001<span style=\"color: #0000ff;\">\u3059\u3079\u3066\u306e\u95a2\u6570\u3067\u9006\u95a2\u6570\u3092\u4f5c\u308c\u308b\u3068\u306f\u9650\u308a\u307e\u305b\u3093\u3002<\/span>\u4f8b\u3048\u3070\\(y=x^2\\)\u306b\u3064\u3044\u3066\u3001\\(x\\)\u306e\u5024\u304c\u6c7a\u307e\u308b\u3068\\(y\\)\u306e\u5024\u3082\u6c7a\u307e\u308a\u307e\u3059\u3002\u305f\u3060\u3001\\(y\\)\u306e\u5024\u304c\u6c7a\u307e\u3063\u3066\u3082\u5019\u88dc\u3068\u306a\u308b\\(x\\)\u306e\u5024\u306f\u4e8c\u3064\u5b58\u5728\u3059\u308b\u305f\u3081\u3001\u4e00\u3064\u306b\u6c7a\u3081\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u305b\u3093\u3002\u3053\u306e\u5834\u5408\u3001\u9006\u95a2\u6570\u3092\u4f5c\u308c\u307e\u305b\u3093\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/hatsudy.com\/jp\/wp-content\/uploads\/2023\/02\/fkfh2.jpg\" alt=\"\" width=\"317\" height=\"264\" class=\"aligncenter size-full wp-image-12614\" \/><\/p>\n<p>\u305f\u3060\u3057\u3001\\(y=x^2\\)\u306b\u3064\u3044\u3066\\(x\\)\u306e\u7bc4\u56f2\u3092\\(x\u22670\\)\u306b\u9650\u5b9a\u3059\u308b\u5834\u5408\u3001\u9006\u95a2\u6570\u3092\u4f5c\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<h3>\u76f4\u7dda\\(y=x\\)\u306b\u5bfe\u79f0\u3068\u306a\u308b\u9006\u95a2\u6570\u306e\u30b0\u30e9\u30d5<\/h3>\n<p>\u306a\u304a\u3001<span style=\"color: #0000ff;\">\u95a2\u6570\u3068\u9006\u95a2\u6570\u306b\u306f\u300c\u76f4\u7dda\\(y=x\\)\u306b\u5bfe\u3057\u3066\u5bfe\u79f0\u306b\u306a\u308b\u300d\u3068\u3044\u3046\u6027\u8cea\u304c\u3042\u308a\u307e\u3059\u3002<\/span>\u5148\u307b\u3069\u3001\\(y=2x+4\\)\u306e\u9006\u95a2\u6570\u304c\\(x=\\displaystyle\\frac{y}{2}-2\\)\u3068\u89e3\u8aac\u3057\u307e\u3057\u305f\u3002\u305d\u3053\u3067\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u56f3\u3092\u4f5c\u308a\u307e\u3057\u3087\u3046\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/hatsudy.com\/jp\/wp-content\/uploads\/2023\/02\/fkfh3.jpg\" alt=\"\" width=\"367\" height=\"263\" class=\"aligncenter size-full wp-image-12615\" \/><\/p>\n<p>\u3053\u306e\u3088\u3046\u306b\u78ba\u8a8d\u3059\u308b\u3068\u3001\u76f4\u7dda\\(y=x\\)\u306b\u5bfe\u3057\u3066\u5bfe\u79f0\u3068\u308f\u304b\u308a\u307e\u3059\u3002<\/p>\n<p>\u53c2\u8003\u307e\u3067\u306b\u3001\u6307\u6570\u95a2\u6570\u3068\u5bfe\u6570\u95a2\u6570\u306f\u9006\u95a2\u6570\u306e\u95a2\u4fc2\u306b\u3042\u308a\u307e\u3059\u3002\u4f8b\u3048\u3070\u3001\\(y=2^x\\)\u3092\u9006\u95a2\u6570\u306b\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>\\(y=2^x\\)<\/p>\n<p>\\(log_2y=log_22^x\\)<\/p>\n<p>\\(x=log_2y\\)<\/p>\n<p>\\(x\\)\u3068\\(y\\)\u3092\u5165\u308c\u66ff\u3048\u308b\u3068\\(y=log_2x\\)\u3068\u306a\u308a\u307e\u3059\u3002\u30b0\u30e9\u30d5\u306b\u3059\u308b\u3068\u4ee5\u4e0b\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/hatsudy.com\/jp\/wp-content\/uploads\/2023\/02\/fkfh4.jpg\" alt=\"\" width=\"351\" height=\"263\" class=\"aligncenter size-full wp-image-12616\" \/><\/p>\n<p>\u3053\u306e\u3088\u3046\u306b\u3001\u76f4\u7dda\\(y=x\\)\u306b\u5bfe\u3057\u3066\u5bfe\u79f0\u3068\u306a\u3063\u3066\u3044\u307e\u3059\u3002\u306a\u304a\\(y=2^x\\)\u3067\u306f\u5fc5\u305a\\(y&gt;0\\)\u306b\u306a\u308a\u307e\u3059\u3002\u4e00\u65b9\u3001\u9006\u95a2\u6570\u3067\u3042\u308b\\(y=log_2x\\)\u3067\u306f\u5fc5\u305a\\(x&gt;0\\)\u306b\u306a\u308a\u307e\u3059\u3002\u3053\u306e\u3088\u3046\u306b\u3001<span style=\"color: #0000ff;\">\u9818\u57df\u306b\u3064\u3044\u3066\u3082\\(x\\)\u3068\\(y\\)\u304c\u5165\u308c\u66ff\u308f\u3063\u3066\u3044\u307e\u3059\u3002<\/span><\/p>\n<p>\u76f4\u7dda\\(y=x\\)\u306b\u5bfe\u3057\u3066\u5bfe\u79f0\u3068\u3044\u3046\u306e\u306f\u3001\u56f3\u5f62\u306e\u5f62\u3060\u3051\u3067\u306a\u304f\u3001\u9818\u57df\u3082\\(x\\)\u3068\\(y\\)\u304c\u5165\u308c\u66ff\u308f\u308b\u3053\u3068\u3092\u7406\u89e3\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<h2>2\u3064\u306e\u95a2\u6570\u3092\u7d44\u307f\u5408\u308f\u305b\u308b\u5408\u6210\u95a2\u6570<\/h2>\n<p>\u6b21\u306b\u5408\u6210\u95a2\u6570\u3092\u5b66\u3073\u307e\u3057\u3087\u3046\u3002\u5408\u6210\u95a2\u6570\u306e\u8a08\u7b97\u306f\u7c21\u5358\u3067\u3042\u308a\u3001\u4e00\u3064\u306e\u95a2\u6570\u3092\u307b\u304b\u306e\u95a2\u6570\u3078\u4ee3\u5165\u3059\u308c\u3070\u3044\u3044\u3067\u3059\u3002\u4f8b\u3048\u3070\\(f(x)=x^2\\)\u3067\u3042\u308a\u3001\\(g(x)=x+1\\)\u306e\u3068\u304d\u3001\u5408\u6210\u95a2\u6570\\((f \\circ g)(x)\\)\u3092\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u8868\u3059\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\\((f \\circ g)(x)=f(g(x))\\)<\/p>\n<p>\\(=(x+1)^2\\)<\/p>\n<p>\u3053\u306e\u3088\u3046\u306b\\(f(x)=x^2\\)\u306b\u3064\u3044\u3066\u3001\\(x\\)\u3078\\(g(x)=x+1\\)\u3092\u4ee3\u5165\u3059\u308b\u3053\u3068\u3067\u5408\u6210\u95a2\u6570\u3092\u5f97\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u4f8b\u3048\u3070\\(y=2^{3x+1}\\)\u3068\u3044\u3046\u306e\u306f\u3001\\(f(x)=2^x\\)\u3068\\(g(x)=3x+1\\)\u3092\u7d44\u307f\u5408\u308f\u305b\u3001\\((f \\circ g)(x)=2^{3x+1}\\)\u306b\u3057\u305f\u95a2\u6570\u3068\u8003\u3048\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u4ee3\u5165\u3059\u308b\u3060\u3051\u306a\u306e\u3067\u3001\u5408\u6210\u95a2\u6570\u306e\u6982\u5ff5\u306f\u7c21\u5358\u3067\u3059\u3002<\/p>\n<h3>\u5408\u6210\u95a2\u6570\u306e\u6027\u8cea\uff1a\u4ea4\u63db\u6cd5\u5247\u3068\u7d50\u5408\u6cd5\u5247<\/h3>\n<p>\u305d\u308c\u3067\u306f\u3001\u5408\u6210\u95a2\u6570\u306b\u306f\u3069\u306e\u3088\u3046\u306a\u6027\u8cea\u304c\u3042\u308b\u306e\u3067\u3057\u3087\u3046\u304b\u3002\u5408\u6210\u95a2\u6570\u306b\u3064\u3044\u3066\u3001\u4ee5\u4e0b\u306e\u6027\u8cea\u3092\u5b66\u3073\u307e\u3057\u3087\u3046\u3002<\/p>\n<ul>\n<li>\u4ea4\u63db\u6cd5\u5247\u306f\u4e00\u822c\u7684\u306b\u6210\u308a\u7acb\u305f\u306a\u3044\uff1a\\((f \\circ g)(x)\u2260(g \\circ f)(x)\\)<\/li>\n<li>\u7d50\u5408\u6cd5\u5247\u306f\u6210\u308a\u7acb\u3064\uff1a\\(((f \\circ g) \\circ h)(x)=(f \\circ (g \\circ h))(x)\\)<\/li>\n<\/ul>\n<p>\u4f8b\u3048\u3070\\(f(x)=x^2\\)\u3001\\(g(x)=x+1\\)\u306b\u3064\u3044\u3066\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<ul>\n<li>\\((f \\circ g)(x)=(x+1)^2\\)<\/li>\n<li>\\((g \\circ f)(x)=x^2+1\\)<\/li>\n<\/ul>\n<p>\u3053\u306e\u3088\u3046\u306b\u3001\u9806\u756a\u3092\u5909\u3048\u308b\u3068\u7570\u306a\u308b\u95a2\u6570\u306b\u306a\u308a\u307e\u3059\u3002\u3053\u308c\u304c\u3001\u4e00\u822c\u7684\u306b\u4ea4\u63db\u6cd5\u5247\u304c\u6210\u308a\u7acb\u305f\u306a\u3044\u7406\u7531\u3067\u3059\u3002<\/p>\n<p>\u4e00\u65b9\u3067\u7d50\u5408\u6cd5\u5247\u306f\u6210\u308a\u7acb\u3061\u307e\u3059\u3002\u4f8b\u3048\u3070\\(f(x)=x^2\\)\u3001\\(g(x)=x+1\\)\u3001\\(h(x)=x+2\\)\u306b\u3064\u3044\u3066\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<ul>\n<li>\\((f \\circ g)(x)=(x+1)^2\\)\u3067\u3042\u308b\u305f\u3081\u3001\\(((f \\circ g) \\circ h)(x)=(x+3)^2\\)<\/li>\n<li>\\((g \\circ h)(x)=x+3\\)\u3067\u3042\u308b\u305f\u3081\u3001\\((f \\circ (g \\circ h))(x)=(x+3)^2\\)<\/li>\n<\/ul>\n<p>\u3053\u306e\u3088\u3046\u306b\u3001\\(((f \\circ g) \\circ h)(x)\\)\\(=(f \\circ (g \\circ h))(x)\\)\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n<h3>\u9006\u95a2\u6570\u3068\u5408\u6210\u95a2\u6570\u306e\u95a2\u4fc2<\/h3>\n<p>\u3053\u3053\u307e\u3067\u3001\u9006\u95a2\u6570\u3068\u5408\u6210\u95a2\u6570\u3092\u5b66\u3093\u3067\u304d\u307e\u3057\u305f\u3002\u305d\u308c\u3067\u306f\u3001\u9006\u95a2\u6570\u3068\u5408\u6210\u95a2\u6570\u306e\u95a2\u4fc2\u6027\u3092\u5b66\u3073\u307e\u3057\u3087\u3046\u3002\u4f8b\u3068\u3057\u3066\u3001\\(f(x)=2x+4\\)\u3092\u5229\u7528\u3057\u307e\u3059\u3002\u3053\u306e\u95a2\u6570\u306e\u9006\u95a2\u6570\u306f\u5148\u307b\u3069\u8a08\u7b97\u3057\u305f\u901a\u308a\\(f^{-1}(x)=\\displaystyle\\frac{x}{2}-2\\)\u3067\u3059\u3002<\/p>\n<p>\u305d\u3053\u3067\u3001\\((f \\circ f^{-1})(x)\\)\u3092\u8a08\u7b97\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>\\((f \\circ f^{-1})(x)=2\u00d7\\left(\\displaystyle\\frac{x}{2}-2\\right)+4\\)<\/p>\n<p>\\((f \\circ f^{-1})(x)=x\\)<\/p>\n<p>\u6b21\u306b\u3001\\((f^{-1} \\circ f)(x)\\)\u3092\u8a08\u7b97\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>\\((f^{-1} \\circ f)(x)=\\displaystyle\\frac{2x+4}{2}-2\\)<\/p>\n<p>\\((f^{-1} \\circ f)(x)=x\\)<\/p>\n<p>\u3053\u3046\u3057\u3066\u3001\\((f \\circ f^{-1})(x)\\)\\(=(f^{-1} \\circ f)(x)=x\\)\u306b\u306a\u308b\u3068\u308f\u304b\u308a\u307e\u3059\u3002\u9006\u95a2\u6570\u3068\u5408\u6210\u95a2\u6570\u306b\u306f\u95a2\u4fc2\u6027\u304c\u3042\u308b\u306e\u3067\u3059\u3002<\/p>\n<h2>\u9006\u95a2\u6570\u3068\u5408\u6210\u95a2\u6570\u306e\u6027\u8cea\u3092\u5b66\u3076<\/h2>\n<p>\u6570\u5b66\u3067\u5fc5\u305a\u5b66\u3076\u5185\u5bb9\u304c\u95a2\u6570\u3067\u3042\u308a\u3001\u9006\u95a2\u6570\u3068\u5408\u6210\u95a2\u6570\u306e\u6982\u5ff5\u3092\u7406\u89e3\u3057\u307e\u3057\u3087\u3046\u3002\u9006\u95a2\u6570\u3068\u5408\u6210\u95a2\u6570\u306e\u6982\u5ff5\u306f\u7c21\u5358\u3067\u3042\u308a\u3001\u5bb9\u6613\u306b\u9006\u95a2\u6570\u3084\u5408\u6210\u95a2\u6570\u3092\u4f5c\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u9006\u95a2\u6570\u3092\u4f5c\u308b\u3068\u304d\u3001\\(x=&#8230;\\)\u306e\u5f0f\u3078\u5909\u5f62\u3057\u305f\u5f8c\u3001\\(x\\)\u3068\\(y\\)\u3092\u4ea4\u63db\u3057\u307e\u3057\u3087\u3046\u3002\u3053\u308c\u306b\u3088\u308a\u3001\u76f4\u7dda\\(y=x\\)\u306b\u5bfe\u3057\u3066\u5bfe\u79f0\u306a\u5f0f\u3092\u5f97\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\\(x\\)\u3084\\(y\\)\u306b\u7bc4\u56f2\u304c\u3042\u308b\u5834\u5408\u3001\u9818\u57df\u306b\u3064\u3044\u3066\u3082\\(x\\)\u3068\\(y\\)\u304c\u5165\u308c\u66ff\u308f\u308a\u307e\u3059\u3002<\/p>\n<p>\u307e\u305f\u5408\u6210\u95a2\u6570\u3092\u4f5c\u308b\u3068\u304d\u3001\u4e00\u3064\u306e\u95a2\u6570\u3092\u4e00\u65b9\u306e\u95a2\u6570\u306b\u4ee3\u5165\u3057\u307e\u3057\u3087\u3046\u3002\u5408\u6210\u95a2\u6570\u3067\u306f\u4ea4\u63db\u6cd5\u5247\u306f\u6210\u308a\u7acb\u305f\u306a\u3044\u3082\u306e\u306e\u3001\u7d50\u5408\u6cd5\u5247\u306f\u6210\u308a\u7acb\u3061\u307e\u3059\u3002\u9006\u95a2\u6570\u3092\u5229\u7528\u3057\u3066\u5408\u6210\u95a2\u6570\u3092\u4f5c\u308b\u3068\u3001\u5fc5\u305a\u7b54\u3048\u304c\\(x\\)\u306b\u306a\u308b\u306e\u3082\u7279\u5fb4\u3067\u3059\u3002<\/p>\n<p>\u9006\u95a2\u6570\u3068\u5408\u6210\u95a2\u6570\u306f\u6570\u5b66\u3067\u57fa\u672c\u7684\u306a\u5185\u5bb9\u306e\u4e00\u3064\u3067\u3042\u308a\u3001\u5fae\u5206\u3084\u7a4d\u5206\u3092\u5b66\u3076\u3068\u304d\u306b\u3082\u5f79\u7acb\u3061\u307e\u3059\u3002\u305d\u3053\u3067\u3001\u9006\u95a2\u6570\u3068\u5408\u6210\u95a2\u6570\u306e\u57fa\u672c\u3092\u7406\u89e3\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u95a2\u6570\u3092\u5229\u7528\u3059\u308b\u3053\u3068\u306b\u3088\u308a\u3001\u7279\u5b9a\u306e\u5024\u3092\u5f97\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002\u3053\u306e\u3068\u304d\u3001\u95a2\u6570\u306b\u306f\u9006\u95a2\u6570\u3084\u5408\u6210\u95a2\u6570\u304c\u3042\u308a\u307e\u3059\u3002 \u9006\u95a2\u6570\u3068\u5408\u6210\u95a2\u6570\u306e\u6982\u5ff5\u306f\u96e3\u3057\u304f\u3042\u308a\u307e\u305b\u3093\u3002\\(x\\)\u3068\\(y\\)\u306e\u5f0f\u3092\u53cd\u5bfe\u306b\u3059\u308b\u3068\u9006\u95a2\u6570\u306b\u306a\u308a\u307e\u3059\u3002\u307e\u305f\u30012\u3064\u306e\u95a2\u6570 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":12620,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[13],"tags":[],"class_list":{"0":"post-12607","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-h-math"},"_links":{"self":[{"href":"https:\/\/hatsudy.com\/jp\/wp-json\/wp\/v2\/posts\/12607","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=12607"}],"version-history":[{"count":11,"href":"https:\/\/hatsudy.com\/jp\/wp-json\/wp\/v2\/posts\/12607\/revisions"}],"predecessor-version":[{"id":12715,"href":"https:\/\/hatsudy.com\/jp\/wp-json\/wp\/v2\/posts\/12607\/revisions\/12715"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/hatsudy.com\/jp\/wp-json\/wp\/v2\/media\/12620"}],"wp:attachment":[{"href":"https:\/\/hatsudy.com\/jp\/wp-json\/wp\/v2\/media?parent=12607"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hatsudy.com\/jp\/wp-json\/wp\/v2\/categories?post=12607"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hatsudy.com\/jp\/wp-json\/wp\/v2\/tags?post=12607"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}