{"provider_url":"https://hatena.blog","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fboxnos.hatenablog.com%2Fentry%2F20080421%2F1208779184\" title=\" Problem 27 - \u7d20\u6570\u751f\u6210\u5f0f - \u30dc\u30af\u30ce\u30b9\" 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_title":"\u30dc\u30af\u30ce\u30b9","type":"rich","provider_name":"Hatena Blog","title":" Problem 27 - \u7d20\u6570\u751f\u6210\u5f0f","published":"2008-04-21 20:59:44","author_url":"https://blog.hatena.ne.jp/tanakaBox/","version":"1.0","author_name":"tanakaBox","description":"\u7d20\u6570\u306a\u554f\u984c\u3002Problem 27 \u30aa\u30a4\u30e9\u30fc\u306f\u4ee5\u4e0b\u306e\u4e8c\u6b21\u5f0f\u3092\u8003\u6848\u3057\u3066\u3044\u308b: n^2 + n + 41.\u3053\u306e\u5f0f\u306f, n\u30920\u304b\u308939\u307e\u3067\u306e\u9023\u7d9a\u3059\u308b\u6574\u6570\u3068\u3057\u305f\u3068\u304d\u306b40\u500b\u306e\u7d20\u6570\u3092\u751f\u6210\u3059\u308b. \u3057\u304b\u3057, n = 40\u306e\u3068\u304d40^2 + 40 + 41 = 40(40 + 1) + 41\u3068\u306a\u308a41\u3067\u5272\u308a\u5207\u308c\u308b. \u307e\u305f, n = 41\u306e\u3068\u304d\u306f41^2 + 41 + 41\u3067\u3042\u308a\u660e\u3089\u304b\u306b41\u3067\u5272\u308a\u5207\u308c\u308b.\u8a08\u7b97\u6a5f\u3092\u7528\u3044\u3066, \u4e8c\u6b21\u5f0f n^2 - 79n + 1601\u3068\u3044\u3046\u5f0f\u304c\u767a\u898b\u3067\u304d\u305f. \u3053\u308c\u306fn = 0 \u304b\u3089 79 \u306e\u9023\u7d9a\u3059\u308b\u6574\u6570\u3067\u7d20\u6570\u3092\u751f\u6210\u3059\u308b. \u4fc2\u6570\u306e\u7a4d\u306f, -79 \u00d7 1601 \u3067 -126479\u3067\u3042\u308b.\u3055\u3066\u2026","width":"100%","url":"https://boxnos.hatenablog.com/entry/20080421/1208779184","blog_url":"https://boxnos.hatenablog.com/","image_url":null,"categories":["Scheme"]}