{"id":1415,"date":"2015-11-27T15:00:39","date_gmt":"2015-11-27T06:00:39","guid":{"rendered":"http:\/\/math.co.jp\/blog\/?p=1415"},"modified":"2015-12-07T18:05:48","modified_gmt":"2015-12-07T09:05:48","slug":"%e9%ab%98%e6%a0%a1%e6%95%b0%e5%ad%a6%e3%81%ae%e4%bc%bc%e3%81%a6%e9%9d%9e%e3%81%aa%e3%82%8b%e5%95%8f%e9%a1%8c%e3%81%ab%e5%af%be%e3%81%97%e6%b7%b1%e3%81%84%e6%84%8f%e8%ad%98%e3%82%92%e6%8c%81%e3%81%a8-2","status":"publish","type":"post","link":"https:\/\/math.co.jp\/blog\/?p=1415","title":{"rendered":"\u9ad8\u6821\u6570\u5b66\u306e\u4f3c\u3066\u975e\u306a\u308b\u554f\u984c\u306b\u5bfe\u3057\u6df1\u3044\u610f\u8b58\u3092\u6301\u3068\u3046 (2)\u3000- \u89e3\u7b54\u7de8 –"},"content":{"rendered":"

2 \u6b21\u65b9\u7a0b\u5f0f\u306e\u5224\u5225\u5f0f\u306b\u95a2\u3059\u308b\u554f\u984c\u3067\u3059\u3002\u5224\u5225\u5f0f\u3092\u5229\u7528\u3057\u3066, 2 \u6b21\u65b9\u7a0b\u5f0f\u304c\u5b9f\u6570\u89e3\u3092\u3082\u3064\u304b\u3069\u3046\u304b\u3092\u5224\u5225\u3067\u304d\u308b\u306e\u306f, \u4fc2\u6570\u304c\u3059\u3079\u3066\u5b9f\u6570\u306e\u5834\u5408\u3067\u3059\u3002\u554f\u984c 1 \u306f\u4fc2\u6570\u304c\u3059\u3079\u3066\u5b9f\u6570\u3067\u3059\u304c, \u554f\u984c 2 \u306b\u306f\u4fc2\u6570\u304c\u865a\u6570\u306e\u3082\u306e\u304c\u3042\u308a\u307e\u3059\u304b\u3089, \u5224\u5225\u5f0f\u3092\u5229\u7528\u3057\u3066\u65b9\u7a0b\u5f0f\u304c\u5b9f\u6570\u89e3\u3092\u3082\u3064\u304b\u3069\u3046\u304b\u306e\u6761\u4ef6\u306f\u5f97\u3089\u308c\u307e\u305b\u3093\u3002\u554f\u984c 2 \u306f\u7b54\u304c \\(k\\leqq 3\\) \u3068\u306a\u3089\u306a\u3044\u3088\u3046\u306b\u6ce8\u610f\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n

\u3010\u554f\u984c 1 \u3011
\n\u3000\u4e0e\u3048\u3089\u308c\u305f 2 \u6b21\u65b9\u7a0b\u5f0f\u306e\u5224\u5225\u5f0f\u3092 \\(D\\) \u3068\u304a\u304f\u3068, \u5b9f\u6570\u89e3\u3092\u3082\u3064\u6761\u4ef6\u306f,
\n\u3000\u3000\\(\\displaystyle\\frac{D}{4}=(2a+1)^{2}-a^{2}\\geqq 0\\)
\n\u3000\u3000\u3000\\((3a+1)(a+1)\\geqq 0\\)
\n\u3000\u3000\u3000\\(a\\leqq -1\\) \u307e\u305f\u306f \\(a\\geqq -\\displaystyle\\frac{1}{3}\\) <\/span>
\n\u3067\u3042\u308b\u3002
\n\u3010\u554f\u984c 2 \u3011
\n\u3000\u4e0e\u3048\u3089\u308c\u305f 2 \u6b21\u65b9\u7a0b\u5f0f\u306f,
\n\u3000\u3000\\((x^{2}-4x+k)+(-2x+4)i=0\\)
\n\u3053\u3053\u3067, \\(x\\) \u3068 \\(k\\) \u306f\u5b9f\u6570\u306a\u306e\u3067,
\n\u3000\u3000\\(\\left\\{ \\begin{array}{l} x^{2}-4x+k=0\\\\
\n-2x+4=0\\\\
\n\\end{array}\\right.\\) <\/span>
\n\u3068\u306a\u308a, \u3053\u308c\u3092\u89e3\u3044\u3066, \\(x=2\\), \\(k=4\\) \u3092\u5f97\u308b\u3002
\n\u3000\u3088\u3063\u3066,
\n\u3000\u3000\\(k=4\\) <\/span><\/p>\n","protected":false},"excerpt":{"rendered":"

2 \u6b21\u65b9\u7a0b\u5f0f\u306e\u5224\u5225\u5f0f\u306b\u95a2\u3059\u308b\u554f\u984c\u3067\u3059\u3002\u5224\u5225\u5f0f\u3092\u5229\u7528\u3057\u3066, 2 \u6b21\u65b9\u7a0b\u5f0f\u304c\u5b9f\u6570\u89e3\u3092\u3082\u3064\u304b\u3069\u3046\u304b\u3092\u5224\u5225\u3067\u304d\u308b\u306e\u306f, \u4fc2\u6570\u304c\u3059\u3079\u3066\u5b9f\u6570\u306e\u5834\u5408\u3067\u3059\u3002\u554f\u984c 1 \u306f\u4fc2\u6570\u304c\u3059\u3079\u3066\u5b9f\u6570\u3067\u3059\u304c, \u554f\u984c 2 \u306b\u306f\u4fc2\u6570\u304c\u865a\u6570\u306e\u3082\u306e\u304c\u3042\u308a\u307e\u3059\u304b […]<\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7,4,19],"tags":[],"class_list":["post-1415","post","type-post","status-publish","format-standard","hentry","category-7","category-4","category-19"],"_links":{"self":[{"href":"https:\/\/math.co.jp\/blog\/index.php?rest_route=\/wp\/v2\/posts\/1415","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/math.co.jp\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/math.co.jp\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/math.co.jp\/blog\/index.php?rest_route=\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/math.co.jp\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1415"}],"version-history":[{"count":4,"href":"https:\/\/math.co.jp\/blog\/index.php?rest_route=\/wp\/v2\/posts\/1415\/revisions"}],"predecessor-version":[{"id":1447,"href":"https:\/\/math.co.jp\/blog\/index.php?rest_route=\/wp\/v2\/posts\/1415\/revisions\/1447"}],"wp:attachment":[{"href":"https:\/\/math.co.jp\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1415"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/math.co.jp\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1415"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/math.co.jp\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1415"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}