{"url":"https://succeed.hatenadiary.org/entry/20060418/1145379387","image_url":null,"categories":[],"published":"2006-04-18 01:56:27","blog_title":"\u98f2\u307f\u7269\u3060\u304b\u3089\u592a\u3089\u306a\u3044","author_url":"https://blog.hatena.ne.jp/succeed/","title":"\u3042\u308b\u95a2\u6570","provider_url":"https://hatena.blog","width":"100%","version":"1.0","description":"http://d.hatena.ne.jp/sumii/20060418/1145352301 f : R -> R\u3067\u3042\u3063\u3066\u3001f(f(x)) = -x\u3068\u306a\u308b\u3088\u3046\u306a\u95a2\u6570f\u3092\u6c42\u3081\u3088\u3002 \u307e\u305a\u3001\u3044\u308d\u3044\u308d\u3068\u8003\u3048\u3066\u307f\u308b\u3002\u307e\u305a\u3001f(0) = 0\u3067\u3042\u308b\u3053\u3068\u304c\u3059\u3050\u306b\u5206\u304b\u308b\u3002\u3068\u3044\u3046\u306e\u306f\u3001f(0) = x\u3068\u7f6e\u304f\u3068\u3001f(x) = f(f(0)) = -0 = 0\u3067\u7121\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u3002\u305d\u3046\u3059\u308b\u3068\u3001f(f(f(0))) = f(f(-x)) = -x\u3067\u3042\u308a\u3001\u304b\u3064f(f(f(0))) = f(-0) = f(0) = x\u306a\u306e\u3067\u3001x = -x\u3068\u306a\u308b\u3002\u3088\u3063\u3066\u3001f(0) = 0\u3068\u306a\u308b\u3002 \u6b21\u306b\u3001f(x) = -f(-x)\u3067\u3042\u308b\u3053\u3068\u3082\u2026","provider_name":"Hatena Blog","author_name":"succeed","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fsucceed.hatenadiary.org%2Fentry%2F20060418%2F1145379387\" title=\"\u3042\u308b\u95a2\u6570 - \u98f2\u307f\u7269\u3060\u304b\u3089\u592a\u3089\u306a\u3044\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","height":"190","blog_url":"https://succeed.hatenadiary.org/","type":"rich"}