{"id":996,"date":"2012-06-10T11:35:16","date_gmt":"2012-06-10T02:35:16","guid":{"rendered":"http:\/\/math.co.jp\/blog\/?p=996"},"modified":"2012-06-10T11:35:44","modified_gmt":"2012-06-10T02:35:44","slug":"%e3%80%8c%e3%81%a9%e3%81%86%e3%82%84%e3%81%a3%e3%81%9f%e3%82%89%e6%80%9d%e3%81%84%e3%81%a4%e3%81%8d%e3%81%be%e3%81%99%e3%81%8b%e7%97%85%e3%80%8d","status":"publish","type":"post","link":"https:\/\/math.co.jp\/blog\/?p=996","title":{"rendered":"\u300c\u3069\u3046\u3084\u3063\u305f\u3089\u601d\u3044\u3064\u304d\u307e\u3059\u304b\u75c5\u300d"},"content":{"rendered":"<p>\u6642\u4ee3\u3068\u3068\u3082\u306b\u4eba\u306e\u8003\u3048\u65b9\u306f\u5909\u5316\u3059\u308b\u306e\u306f\u5f53\u7136\u3067\u3042\u308b\u3002\u305d\u308c\u306f\u3001\u5b50\u4f9b\u3068\u5b50\u4f9b\u3092\u80b2\u3066\u308b\u89aa\u306b\u3082\u3042\u3066\u306f\u307e\u308b\u3002<\/p>\n<p>\u79c1\u306e\u5c11\u5e74\u6642\u4ee3\u306f\u662d\u548c 40 \u5e74\u4ee3\uff5e50\u5e74\u4ee3\u3067\u3042\u308b\u304c\u3001\u305d\u306e\u5f53\u6642\u306e\u89aa\u306e\u4e16\u4ee3\u306f\u3001\u6226\u524d\u306b\u5c11\u5e74\u671f\u3092\u904e\u3054\u3057\u305f\u4eba\u305f\u3061\u3067\u3042\u308a\u3001\u6226\u524d\u3001\u6226\u5f8c\u3068\u3044\u3046\u5927\u5909\u9769\u304c\u3042\u3063\u305f\u305f\u3081\u5b50\u4f9b\u304c\u5909\u5316\u3059\u308b\u3053\u3068\u306f\u5272\u3068\u7c21\u5358\u306b\u53d7\u3051\u5165\u308c\u3089\u308c\u305f\u3088\u3046\u3060\u3002<br \/>\n\u3053\u308c\u306b\u5bfe\u3057\u30011990 \u5e74\u4ee3\u3068\u73fe\u5728\u306e 20 \u5e74\u9593\u306f\u3053\u306e\u3088\u3046\u306a\u975e\u5e38\u306b\u5927\u304d\u306a\u793e\u4f1a\u4f53\u5236\u306e\u5909\u52d5\u306f\u306a\u304b\u3063\u305f\u306e\u3067\u3001\u5b50\u4f9b\u306e\u5909\u5316\u306b\u306f\u3042\u307e\u308a\u95a2\u5fc3\u304c\u306a\u3044\u4eba\u3082\u5c11\u306a\u304f\u306a\u3044\u306e\u304b\u3082\u3057\u308c\u306a\u3044\u304c\u3001\u5b9f\u306f\u5927\u304d\u304f\u5909\u5316\u3057\u3066\u3044\u308b\u3068\u611f\u3058\u3066\u3044\u308b\u3002<\/p>\n<p>\u305d\u306e\u6700\u8fd1\u306e\u9ad8\u6821\u751f\u3068\u63a5\u3057\u3066\u3044\u308b\u3068\u300120 \u5e74\u524d\u306e1990\u5e74\u4ee3\u306e\u5b50\u4f9b\u305f\u3061\u3068\u5909\u308f\u3063\u305f\u306a\u3068\u601d\u3046\u3053\u3068\u304c\u3044\u304f\u3064\u304b\u3042\u308b\u3002<br \/>\n\u307e\u305a\u3001\u4eca\u306e\u9ad8\u6821\u751f\u306f\u3001\u6614\u3068\u6bd4\u3079\u308b\u3068\u975e\u5e38\u306b\u89aa\u306e\u76ee\u304c\u884c\u304d\u5c4a\u3044\u3066\u3044\u308b\u3002\u305d\u308c\u306f\u3088\u3044\u3053\u3068\u304b\u3082\u3057\u308c\u306a\u3044\u304c\u3001\u3068\u304d\u306b\u306f\u3084\u308a\u3059\u304e\u3068\u611f\u3058\u3066\u3044\u308b\u3082\u306e\u3082\u3042\u308b\u3002<br \/>\n\u4f8b\u3048\u3070\u3001\u590f\u671f\u8b1b\u7fd2\u3092\u59cb\u3081\u3066\u9ad8\u6821\u751f\u304c\u53d7\u3051\u308b\u3068\u304d\u3001\u305d\u306e\u89aa\u304c\u587e\u30fb\u4e88\u5099\u6821\u306b\u96fb\u8a71\u3092\u304b\u3051\u3066\u304d\u3066<br \/>\n\u300c\u3046\u3061\u306e\u5b50\u306f\u4eba\u898b\u77e5\u308a\u306a\u306e\u3067\u3001\u3046\u3061\u306e\u5b50\u304c\u6388\u696d\u306e\u5185\u5bb9\u3092\u308f\u304b\u3063\u3066\u3044\u306a\u3044\u3088\u3046\u306a\u611f\u3058\u3067\u3057\u305f\u3089\u3001\u5148\u751f\u306e\u65b9\u304b\u3089\u58f0\u3092\u304b\u3051\u3066\u304f\u3060\u3055\u3044\u300d<br \/>\n\u306a\u3069\u306e\u3053\u3068\u3092\u983c\u3080(\u3068\u304d\u306b\u306f\u547d\u4ee4\u3059\u308b)\u306e\u306f\u73cd\u3057\u304f\u306a\u3044\u3002<br \/>\n\u3053\u306e\u3088\u3046\u306b\u3001\u672c\u6765\u306f\u5b50\u4f9b\u81ea\u8eab\u3067\u89e3\u6c7a\u3059\u3079\u304d\u554f\u984c\u3092\u3001\u89aa\u304c\u5148\u56de\u308a\u3057\u3066\u89e3\u6c7a\u3057\u3066\u3057\u307e\u3046\u3068\u3001\u305d\u306e\u7d50\u679c\u3001\u5b50\u4f9b\u306f\u89aa\u306e\u6577\u3044\u305f\u30ec\u30fc\u30eb\u306e\u4e0a\u3092\u9032\u3080\u3060\u3051\u306b\u306a\u308a\u3001\u81ea\u5206\u3067\u5224\u65ad\u3057\u3001\u4e3b\u5f35\u3092\u3059\u308b\u6a5f\u4f1a\u304c\u306a\u304f\u306a\u308b\u3002\u305d\u3057\u3066\u3001\u305d\u306e\u3046\u3061\u306b\u5927\u4eba\u306b\u306a\u3063\u3066\u81ea\u5206\u3067\u5224\u65ad\u3057\u3001\u4e3b\u5f35\u3057\u306a\u3051\u308c\u3070\u306a\u3089\u306a\u3044\u3068\u304d\u306b\u3001\u305d\u308c\u307e\u3067\u306e\u4e3b\u5f35\u306e\u624b\u52a0\u6e1b\u304c\u308f\u304b\u3089\u306a\u3044\u304b\u3089\u3001\u3068\u3093\u3067\u3082\u306a\u3044\u3053\u3068\u3092\u6025\u306b\u4e3b\u5f35\u3057\u305f\u308a\u3059\u308b\u3002<\/p>\n<p>\u307e\u305f\u3001\u8003\u3048\u308b\u7fd2\u6163\u30fb\u5224\u65ad\u3059\u308b\u7fd2\u6163\u304c\u306a\u3044\u305f\u3081\u3001\u3059\u3050\u308f\u304b\u308b\u3053\u3068\u307e\u3067\u8cea\u554f\u3057\u3066\u304f\u308b\u3002<br \/>\n\u4f8b\u3048\u3070\u3001\u3042\u308b\u751f\u5f92\u304c\u666e\u6bb5\u7fd2\u3063\u3066\u3044\u308b\u82f1\u8a9e\u306e\u5148\u751f\u306b\u8cea\u554f\u3057\u305f\u3068\u304d\u3001\u305d\u306e\u5148\u751f\u304c\u300c\u305d\u306e\u8a71\u306f(\u5225\u306e)\u82f1\u8a9e\u306eP\u5148\u751f\u304c\u8a73\u3057\u3044\u304b\u3089\u805e\u3044\u3066\u307f\u308b\u3068\u3044\u3044\u3088\u300d\u3068\u8a00\u3063\u305f\u3068\u3059\u308b\u3002<br \/>\n\u305d\u306e\u3068\u304d\u306b\u3001\u305d\u306e\u751f\u5f92\u306f P \u5148\u751f\u3092\u77e5\u3089\u306a\u304b\u3063\u305f\u5834\u5408\u306b\u3001\u300cP \u5148\u751f\u306b\u306f\u4f55\u3066\u805e\u3051\u3070\u3088\u3044\u3067\u3059\u304b\u300d\u3068\u304b\u300cP\u5148\u751f\u306b\u306f\u3069\u3046\u3044\u3046\u3075\u3046\u306b\u805e\u3051\u3070\u30d7\u30ea\u30f3\u30c8\u3092\u3082\u3089\u3048\u307e\u3059\u304b\u300d<br \/>\n\u306e\u3088\u3046\u306a\u3053\u3068\u3092\u4e8b\u7d30\u304b\u304f\u5c0b\u306d\u3066\u304f\u308b\u3053\u3068\u306f\u73cd\u3057\u304f\u306a\u3044\u3002<\/p>\n<p>\u3053\u308c\u306f\u3001\u6b21\u306e\u3088\u3046\u306a\u4f1a\u8a71\u306b\u4f3c\u3066\u3044\u308b\u3002<br \/>\n\u9ad8\u6821\u751f A: \u300c\u304a\u8336\u306e\u6c34\u304b\u3089\u65b0\u5bbf\u306b\u884c\u304f\u306b\u306f\u3069\u306e\u3088\u3046\u306b\u3059\u308b\u3068\u3088\u3044\u3067\u3059\u304b?\u300d<br \/>\n\u5927\u4eba B: \u300c\u4e2d\u592e\u7dda\u3092\u4f7f\u3046\u3068\u3044\u3044\u3088\u3002\u4e2d\u592e\u7dda\u306f JR \u3060\u304b\u3089 JR \u304a\u8336\u306e\u6c34\u99c5\u306b\u884c\u3063\u3066\u3002\u300d<br \/>\n\u9ad8\u6821\u751f A: \u300c\u304a\u8336\u306e\u6c34\u99c5\u306f\u3069\u3053\u3067\u3059\u304b?\u300d<br \/>\n\u5927\u4eba B: \u300c\u3042\u305d\u3053\u306b\u898b\u3048\u308b\u99c5\u3060\u3088\u3002\u300d<br \/>\n\u9ad8\u6821\u751f A: \u300c\u3044\u304f\u3089\u304f\u3089\u3044\u3067\u884c\u3051\u307e\u3059\u304b?\u300d (a)<br \/>\n\u5927\u4eba B: \u300c200 \u5186\u4ee5\u4e0b\u3067\u884c\u3051\u308b\u3068\u601d\u3046\u3088\u3002\u300d<br \/>\n\u9ad8\u6821\u751f A: \u300c\u5207\u7b26\u306f\u3069\u3046\u3084\u3063\u3066?\u300d<br \/>\n\u5927\u4eba B: \u300c\u81ea\u8ca9\u6a5f\u304c\u3042\u308b\u304b\u3089\u3002\u300d<br \/>\n\u9ad8\u6821\u751f A: \u300c\u3069\u306e\u81ea\u8ca9\u6a5f\u3067\u8cb7\u3048\u3070\u3088\u3044\u3067\u3059\u304b? \u300d\u300c\u3069\u306e\u30dc\u30bf\u30f3\u3092\u62bc\u305b\u3070\u3088\u3044\u3067\u3059\u304b?\u300d\u3000(b)<br \/>\n\u5927\u4eba B:\u300c\u30fb\u30fb\u30fb\u30fb\u300d<\/p>\n<p>\u3053\u306e\u4e2d\u3067\u3082 (a), (b) \u306e\u8cea\u554f\u3092\u3059\u308b\u4eba\u306f\u3042\u307e\u308a\u3044\u306a\u3044\u3060\u308d\u3046\u304c\u3001\u3053\u3068\u6570\u5b66\u306b\u95a2\u3057\u3066\u306f\u3053\u308c\u306b\u76f8\u5f53\u3059\u308b\u8cea\u554f\u3092\u3059\u308b\u4eba\u304c\u8fd1\u5e74\u5897\u3048\u3066\u3044\u308b\u3053\u3068\u304c\u6c17\u306b\u306a\u308b\u3068\u3053\u308d\u3067\u3042\u308b\u3002<\/p>\n<p>\u305d\u306e\u6570\u5b66\u306e\u8cea\u554f\u306e\u4e00\u3064\u306f\u3001\u3042\u308b\u554f\u984c\u306e\u89e3\u7b54\u3092\u8aac\u660e\u3057\u305f\u3068\u304d\u306b\u3001<\/p>\n<p>\u300c(\u3053\u306e\u89e3\u7b54)\u3069\u3046\u3084\u3063\u305f\u3089\u601d\u3044\u3064\u304d\u307e\u3059\u304b?\u300d<\/p>\n<p>\u3068\u3044\u3046\u3082\u306e\u3067\u3042\u308b\u3002\u3053\u308c\u306f\u3001(\u79c1\u306e\u77e5\u308b\u7bc4\u56f2\u3067\u306f)\u5c11\u306a\u304f\u3068\u3082 20 \u5e74\u524d\u306b\u306f\u306a\u304b\u3063\u305f\u8cea\u554f\u3067\u3042\u308b\u3002<br \/>\n\u3082\u3061\u308d\u3093\u3001\u591a\u5c11\u306f\u3053\u306e\u3088\u3046\u306a\u8cea\u554f\u3092\u3059\u308b\u306e\u306f\u8a31\u3055\u308c\u308b\u3068\u3057\u3066\u3082\u3001\u3064\u306d\u306b\u3053\u306e\u3088\u3046\u306a\u8cea\u554f\u3092\u9023\u767a\u3059\u308b\u3088\u3046\u3067\u306f\u3001\u6570\u5b66\u306e\u5b66\u7fd2\u6cd5\u3092\u9593\u9055\u3048\u3066\u3044\u308b\u3068\u601d\u308f\u3056\u308b\u3092\u5f97\u306a\u3044\u3002<\/p>\n<p>\u3053\u306e\u3088\u3046\u306a\u8cea\u554f\u306b\u3064\u3044\u3066\u306f\u3001\u6b21\u306e 2 \u3064\u306e\u30b1\u30fc\u30b9\u304c\u3042\u308b\u3002<\/p>\n<p>********************<br \/>\n[Case 1]: \u300c\u3042\u308b\u6570\u3092 2 \u4e57\u3057\u3066\u3001\u305d\u306e\u3042\u308b\u6570\u3092\u52a0\u3048\u308b\u3068 6 \u306b\u306a\u3063\u305f\u3002\u3042\u308b\u6570\u306f\u4f55\u304b\u300d<br \/>\n\u3068\u3044\u3046\u554f\u984c\u306b\u5bfe\u3057\u3066\u3001\u89e3\u7b54\u3068\u3057\u3066 2 \u6b21\u65b9\u7a0b\u5f0f x^2 +x=6 \u3092\u307e\u305a\u4f5c\u3063\u305f\u3068\u3059\u308b\u3002\u3053\u306e\u3068\u304d\u306b\u3001<\/p>\n<p>\u300c\u3069\u3046\u3057\u305f\u3089 2 \u6b21\u65b9\u7a0b\u5f0f\u3092\u4f5c\u308b\u3053\u3068\u3092\u601d\u3044\u3064\u304d\u307e\u3059\u304b?\u300d<\/p>\n<p>\u3068\u3044\u3046\u8cea\u554f\u3092\u8fd4\u3057\u3066\u304f\u308b\u3002<\/p>\n<p>[Case 2]: \u5186 x^2 +y^2=1 \u3092 C \u3068\u3057\u3066\u3001C \u306e\u5916\u90e8\u306e\u70b9 P(a,b) \u304b\u3089\u63a5\u7dda\u3092\u5f15\u304f\u3002\u305d\u306e 2 \u3064\u306e\u63a5\u70b9\u3092 Q, R \u3068\u3059\u308b\u3068\u304d\u3001\u76f4\u7dda QR \u306e\u65b9\u7a0b\u5f0f\u306f ax+by=1 \u3067\u3042\u308b\u304c\u3001\u3053\u308c\u3092\u8aac\u660e\u3059\u308b\u6709\u540d\u306a\u65b9\u6cd5\u304c\u3042\u308b\u3002<br \/>\n(\u6975\u7dda\u3067\u691c\u7d22\u3059\u308b\u304b\u3001http:\/\/oshiete.goo.ne.jp\/qa\/3301439.html\u3000\u306a\u3069\u3092\u53c2\u7167)<\/p>\n<p>\u305d\u308c\u306b\u5bfe\u3057\u3066\u3001<\/p>\n<p>\u300c\u3053\u306e\u3088\u3046\u306a\u65b9\u6cd5\u306f\u81ea\u5206\u306b\u306f\u601d\u3044\u3064\u304d\u307e\u305b\u3093\u300d<\/p>\n<p>\u3068\u3044\u3046\u3002<br \/>\n********************<\/p>\n<p>[Case 1\u300d\u3068[Case 2\u300d\u3067\u306f\u72b6\u6cc1\u304c\u7570\u306a\u308b\u3002<\/p>\n<p>[Case 1\u300d\u306f\u3001<br \/>\n\u300c\u30de\u30cb\u30e5\u30a2\u30eb\u4f9d\u5b58\u578b\u300d\u3001\u300c\u30ce\u30a4\u30ed\u30fc\u30bc\u578b\u300d<br \/>\n\u306e\u4eba\u304c\u591a\u3044\u3002\u4eee\u306b\u300c2\u6b21\u65b9\u7a0b\u5f0f\u3092\u4f5c\u308b\u3053\u3068\u306e\u601d\u3044\u3064\u304d\u65b9\u300d\u3092\u6559\u3048\u305f\u3068\u3053\u308d\u3067\u3001\u305d\u308c\u3092\u8a66\u9a13\u4e2d\u306b\u3044\u3061\u3044\u3061\u5b9f\u884c\u3059\u308b\u306e\u3060\u308d\u3046\u304b\u3002<\/p>\n<p>\u6b74\u53f2\u306b\u4f8b\u3048\u308b\u306a\u3089\u3001\u5148\u751f\u304c<br \/>\n\u300c\u938c\u5009\u5e55\u5e9c\u6210\u7acb\u306e1192\u5e74\u306f\u300e\u3044\u3044\u304f\u306b\u4f5c\u308d\u3046\u938c\u5009\u5e55\u5e9c\u300f\u3068\u899a\u3048\u3088\u3046\u300d<br \/>\n\u3068\u8a00\u3046\u3068\u3001<br \/>\n\u300c\u5148\u751f, \u3069\u3046\u3084\u3063\u305f\u3089\u300e\u3044\u3044\u304f\u306b\u30fb\u30fb\u30fb\u30fb\u300f\u3092\u601d\u3044\u3064\u304d\u307e\u3059\u304b?\u300d<br 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