{"title":"a%\u4e0b\u304c\u3063\u3066\u304b\u3089a%\u4e0a\u304c\u3063\u3066\u3082\u5143\u306b\u623b\u3089\u306a\u3044","url":"https://ototokunsan.hatenadiary.jp/entry/2022/10/07/125130","author_name":"ototokunsan","image_url":null,"blog_url":"https://ototokunsan.hatenadiary.jp/","version":"1.0","blog_title":"\u72ec\u308a\u8a00","categories":["\u6295\u8cc7","\u91d1"],"description":"a%\u4e0b\u304c\u3063\u3066\u304b\u3089b\uff05\u4e0a\u304c\u308b\u3068(1-a/100)(1+b/100)\u500d\u306b\u306a\u308bb = a\u306e\u5834\u54081-(a/100)^2\u306a\u306e\u30671\u3088\u308a\u5c0f\u3055\u304f\u306a\u308b\u3002\u4f8b\u3048\u3070a = 30\u306e\u5834\u54081- 0.09 = 0.91 \u3067\u306f\u5143\u306b\u623b\u3059\u306b\u306f\u4f55\uff05\u4e0a\u304c\u308c\u3070\u3044\u3044\u304b (1-a/100)(1+b/100) = 1\u3053\u308c\u3092\uff42\u306b\u3064\u3044\u3066\u89e3\u3051\u3070b = 100a/(100-a) \u4f8b\u3048\u3070a = 30 \u306e\u3068\u304d b=42.86...a = 80 \u306e\u3068\u304d b=400\uff18\uff10\uff05\u4e0b\u304c\u3063\u305f\u8fba\u3067\u8cb7\u3063\u305f\u6b86\u3069\u306e\u4eba\u304c\uff14\u500d\u306b\u306a\u308b\u524d\u58f2\u308b\u306e\u3067\u66b4\u843d\u3057\u305f\u3068\u304d\u306b\u5143\u306b\u623b\u3059\u306e\u306f\u96e3\u3057\u3044\u3002","published":"2022-10-07 12:51:30","provider_name":"Hatena Blog","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fototokunsan.hatenadiary.jp%2Fentry%2F2022%2F10%2F07%2F125130\" title=\"a%\u4e0b\u304c\u3063\u3066\u304b\u3089a%\u4e0a\u304c\u3063\u3066\u3082\u5143\u306b\u623b\u3089\u306a\u3044 - \u72ec\u308a\u8a00\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","type":"rich","provider_url":"https://hatena.blog","height":"190","author_url":"https://blog.hatena.ne.jp/ototokunsan/","width":"100%"}