{"id":527,"date":"2012-12-25T08:20:51","date_gmt":"2012-12-24T23:20:51","guid":{"rendered":"http:\/\/www.roundown.net\/nyushi\/?p=527"},"modified":"2021-10-31T06:50:20","modified_gmt":"2021-10-30T21:50:20","slug":"tkb201201","status":"publish","type":"post","link":"https:\/\/www.roundown.net\/nyushi\/tkb201201\/","title":{"rendered":"\u6771\u5927\u6587\u7cfb2012\uff1a\u7b2c1\u554f"},"content":{"rendered":"<hr \/>\n<p>\u5ea7\u6a19\u5e73\u9762\u4e0a\u306e\u70b9 \\(( x , y )\\) \u304c\u6b21\u306e\u65b9\u7a0b\u5f0f\u3092\u6e80\u305f\u3059.\r\n\\[\r\n2x^2+4xy+3y^2+4x+5y-4 = 0\r\n\\]\r\n\u3053\u306e\u3068\u304d, \\(x\\) \u306e\u3068\u308a\u3046\u308b\u6700\u5927\u306e\u5024\u3092\u6c42\u3081\u3088.<\/p>\r\n<hr \/>\r\n<!--more-->\r\n<h2>\u3010 \u89e3 \u7b54 \u3011<\/h2>\r\n<p>\u4e0e\u3048\u3089\u308c\u305f\u65b9\u7a0b\u5f0f\u3092 \\(y\\) \u306e \\(2\\) \u6b21\u65b9\u7a0b\u5f0f\u3068\u307f\u308c\u3070\r\n\\[\r\n3y^2 +(4x+5)y +2x^2+4x-4 = 0\\quad ... [1]\r\n\\]\r\n\\(x\\) \u306e\u3068\u308a\u3046\u308b\u5024\u306e\u7bc4\u56f2\u306f, [1] \u304c\u5b9f\u6570\u89e3\u3092\u3082\u3064\u6761\u4ef6\u306a\u306e\u3067, \u5224\u5225\u5f0f \\(D\\) \u306b\u3064\u3044\u3066\r\n\\[\\begin{align}\r\nD = (4x+5)^2 -4 \\cdot 3 (2x^2+4x-4) & \\geqq 0 \\\\\r\n16x^2 +40x +25 -24x^2 -48x +48 & \\leqq 0 \\\\\r\n8x^2 +8x -73 & \\leqq 0 \\\\\r\n\\text{\u2234} \\quad \\dfrac{-2 -5 \\sqrt{6}}{4} \\leqq y \\leqq \\dfrac{-2 +5 \\sqrt{6}}{4} &\r\n\\end{align}\\]\r\n\u3088\u3063\u3066, \u6c42\u3081\u308b\u6700\u5927\u5024\u306f\r\n\\[\r\n\\underline{\\dfrac{-2 +5 \\sqrt{6}}{4}}\r\n\\]\r\n","protected":false},"excerpt":{"rendered":"\u5ea7\u6a19\u5e73\u9762\u4e0a\u306e\u70b9 \\(( x , y )\\) \u304c\u6b21\u306e\u65b9\u7a0b\u5f0f\u3092\u6e80\u305f\u3059. \\[ 2x^2+4xy+3y^2+4x+5y-4 = 0 \\] \u3053\u306e\u3068\u304d, \\(x\\) \u306e\u3068\u308a\u3046\u308b\u6700\u5927\u306e\u5024\u3092\u6c42\u3081\u3088.","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"footnotes":""},"categories":[78],"tags":[68,149],"class_list":["post-527","post","type-post","status-publish","format-standard","hentry","category-tokyo_b_2012","tag-68","tag-tokyo_b"],"_links":{"self":[{"href":"https:\/\/www.roundown.net\/nyushi\/wp-json\/wp\/v2\/posts\/527","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.roundown.net\/nyushi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.roundown.net\/nyushi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.roundown.net\/nyushi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.roundown.net\/nyushi\/wp-json\/wp\/v2\/comments?post=527"}],"version-history":[{"count":0,"href":"https:\/\/www.roundown.net\/nyushi\/wp-json\/wp\/v2\/posts\/527\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.roundown.net\/nyushi\/wp-json\/wp\/v2\/media?parent=527"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.roundown.net\/nyushi\/wp-json\/wp\/v2\/categories?post=527"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.roundown.net\/nyushi\/wp-json\/wp\/v2\/tags?post=527"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}