{"id":12427,"date":"2023-01-24T23:38:07","date_gmt":"2023-01-24T14:38:07","guid":{"rendered":"https:\/\/hatsudy.com\/jp\/?p=12427"},"modified":"2023-02-04T07:49:45","modified_gmt":"2023-02-03T22:49:45","slug":"parabola-2","status":"publish","type":"post","link":"https:\/\/hatsudy.com\/jp\/parabola-2.html","title":{"rendered":"\u4e8c\u6b21\u66f2\u7dda\u3068\u76f4\u7dda\uff1a\u5224\u5225\u5f0f\u3067\u306e\u5171\u6709\u70b9\u306e\u500b\u6570\u3001\u5f26\u306e\u9577\u3055"},"content":{"rendered":"\n<p>\u66f2\u7dda\u3068\u76f4\u7dda\u3092\u7528\u3044\u308b\u3068\u304d\u3001\u4ea4\u70b9\uff08\u5171\u6709\u70b9\uff09\u306e\u5ea7\u6a19\u3092\u8a08\u7b97\u3057\u306a\u3051\u308c\u3070\u3044\u3051\u306a\u3044\u3053\u3068\u306f\u591a\u3044\u3067\u3059\u3002\u305d\u3053\u3067\u653e\u7269\u7dda\u3084\u6955\u5186\u3001\u53cc\u66f2\u7dda\u306b\u3064\u3044\u3066\u3001\u76f4\u7dda\u3068\u306e\u4ea4\u70b9\u3092\u8a08\u7b97\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>\u306a\u304a\u5171\u6709\u70b9\u306e\u500b\u6570\u3092\u78ba\u8a8d\u3059\u308b\u3068\u304d\u3001\u5224\u5225\u5f0f\\(D\\)\u304c\u6709\u52b9\u3067\u3059\u3002\u5224\u5225\u5f0f\u306f\u4e8c\u6b21\u95a2\u6570\u3060\u3051\u3067\u306a\u304f\u3001\u653e\u7269\u7dda\u3084\u6955\u5186\u3001\u53cc\u66f2\u7dda\u306b\u3064\u3044\u3066\u3082\u5229\u7528\u3067\u304d\u308b\u306e\u3067\u3059\u3002<\/p>\n<p>\u307e\u305f\u66f2\u7dda\u3068\u76f4\u7dda\u306b\u3088\u3063\u3066\u4ea4\u70b9\u304c\u4f5c\u3089\u308c\u308b\u5834\u5408\u3001\u5f26\u304c\u4f5c\u3089\u308c\u307e\u3059\u3002\u305d\u3053\u3067\u3001\u5f26\u306e\u4e2d\u70b9\u3084\u9577\u3055\u3092\u8a08\u7b97\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u3087\u3046\u3002\u89e3\u3068\u4fc2\u6570\u306e\u95a2\u4fc2\u3092\u5229\u7528\u3059\u308b\u3053\u3068\u306b\u3088\u308a\u3001\u5f26\u306e\u4e2d\u70b9\u3068\u9577\u3055\u3092\u5f97\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u305d\u308c\u3067\u306f\u3001\u3069\u306e\u3088\u3046\u306b\u4e8c\u6b21\u66f2\u7dda\u3068\u76f4\u7dda\u306e\u95a2\u4fc2\u3092\u5229\u7528\u3059\u308b\u3053\u3068\u3067\u8a08\u7b97\u3059\u308c\u3070\u3044\u3044\u306e\u3067\u3057\u3087\u3046\u304b\u3002\u4e8c\u6b21\u66f2\u7dda\u3068\u76f4\u7dda\u3092\u5229\u7528\u3057\u3066\u8a08\u7b97\u554f\u984c\u3092\u89e3\u304f\u65b9\u6cd5\u3092\u89e3\u8aac\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n<h2>\u4e8c\u6b21\u66f2\u7dda\u3068\u76f4\u7dda\u306e\u4ea4\u70b9\uff08\u5171\u6709\u70b9\uff09\u306e\u5ea7\u6a19\u3092\u5f97\u308b<\/h2>\n<p>\u4e8c\u6b21\u95a2\u6570\u306f\u4e8c\u6b21\u66f2\u7dda\u3068\u6027\u8cea\u304c\u307b\u307c\u540c\u3058\u3067\u3059\u3002\u5b9f\u969b\u3001\u653e\u7269\u7dda\u306e\u7279\u6b8a\u306a\u30b1\u30fc\u30b9\u304c\u4e8c\u6b21\u95a2\u6570\u3067\u3059\u3002\u305d\u306e\u305f\u3081\u3001\u4e8c\u6b21\u66f2\u7dda\u3067\u5171\u6709\u70b9\u306e\u5ea7\u6a19\u3092\u5f97\u308b\u65b9\u6cd5\u306f\u4e8c\u6b21\u95a2\u6570\u306e\u5834\u5408\u3068\u540c\u3058\u3067\u3059\u3002<\/p>\n<p>\u4e8c\u6b21\u95a2\u6570\u3068\u76f4\u7dda\u306e\u4ea4\u70b9\u5ea7\u6a19\u3092\u5f97\u305f\u3044\u5834\u5408\u3001\u4ee3\u5165\u3059\u308b\u3053\u3068\u3067\u8a08\u7b97\u3092\u3057\u307e\u3059\u3002\u540c\u3058\u3088\u3046\u306b\u3001<span style=\"color: #0000ff;\">\u4e8c\u6b21\u66f2\u7dda\u306b\u3064\u3044\u3066\u3082\u3001\u76f4\u7dda\u306e\u5f0f\u3092\u5909\u5f62\u5f8c\u306b\u4ee3\u5165\u3059\u308b\u3053\u3068\u3067\u5ea7\u6a19\u3092\u8a08\u7b97\u3057\u307e\u3057\u3087\u3046\u3002<\/span>\u305d\u308c\u3067\u306f\u3001\u4ee5\u4e0b\u306e\u554f\u984c\u306e\u7b54\u3048\u306f\u4f55\u3067\u3057\u3087\u3046\u304b\u3002<\/p>\n<ul>\n<li>\\(y^2=x\\)\u3068\\(x-2y-3=0\\)\u306e\u4ea4\u70b9\u5ea7\u6a19\u3092\u6c42\u3081\u307e\u3057\u3087\u3046\u3002<\/li>\n<\/ul>\n<p>\\(x-2y-3=0\\)\u3092\u5909\u5f62\u3059\u308b\u3068\\(x=2y+3\\)\u3067\u3059\u3002\u305d\u3053\u3067\\(x=2y+3\\)\u3092\\(y^2=x\\)\u3078\u4ee3\u5165\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>\\(y^2=x\\)<\/p>\n<p>\\(y^2=2y+3\\)<\/p>\n<p>\\(y^2-2y-3=0\\)<\/p>\n<p>\\((y-3)(y+1)=0\\)<\/p>\n<p>\u3053\u3046\u3057\u3066\u3001\\(y=-1,3\\)\u3068\u308f\u304b\u308a\u307e\u3057\u305f\u3002\u307e\u305f\\(y=-1,3\\)\u3067\u3042\u308b\u305f\u3081\u3001\u4ea4\u70b9\u5ea7\u6a19\u306f\\((1,-1)\\)\u3068\\((9,3)\\)\u3067\u3059\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/hatsudy.com\/jp\/wp-content\/uploads\/2023\/01\/hew13.jpg\" alt=\"\" width=\"350\" height=\"263\" class=\"aligncenter size-full wp-image-12560\" \/><\/p>\n<p>\u4ee3\u5165\u3057\u3066\u8a08\u7b97\u3059\u308c\u3070\u3044\u3044\u3060\u3051\u306a\u306e\u3067\u3001\u4ea4\u70b9\u5ea7\u6a19\u3092\u5f97\u308b\u306e\u306f\u7c21\u5358\u3067\u3059\u3002<\/p>\n<h3>\u5224\u5225\u5f0f\\(D\\)\u3092\u5229\u7528\u3057\u3066\u5171\u6709\u70b9\u306e\u500b\u6570\u3092\u5224\u65ad\u3059\u308b<\/h3>\n<p>\u4e8c\u6b21\u95a2\u6570\u3068\u6027\u8cea\u304c\u540c\u3058\u3067\u3042\u308b\u305f\u3081\u3001\u4e8c\u6b21\u66f2\u7dda\u3067\u306f\u5224\u5225\u5f0f\\(D\\)\u3092\u5229\u7528\u3059\u308b\u3053\u3068\u3067\u5171\u6709\u70b9\u306e\u500b\u6570\u3092\u5224\u65ad\u3067\u304d\u307e\u3059\u30022\u3064\u306e\u65b9\u7a0b\u5f0f\u3092\u9023\u7acb\u3055\u305b\u305f\u5f8c\u3001\u5224\u5225\u5f0f\\(D\\)\u306e\u5024\u306b\u3088\u3063\u3066\u5171\u6709\u70b9\u306e\u500b\u6570\u3092\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u5224\u65ad\u3057\u307e\u3059\u3002<\/p>\n<ul>\n<li>\u5224\u5225\u5f0f\\(D\\)\u304c\u6b63\u306e\u5024\uff1a2\u3064\u306e\u5171\u6709\u70b9\u3092\u3082\u3064<\/li>\n<li>\u5224\u5225\u5f0f\\(D\\)\u304c0\uff1a1\u3064\u306e\u5171\u6709\u70b9\u3092\u3082\u3064\uff08\u91cd\u89e3\uff09<\/li>\n<li>\u5224\u5225\u5f0f\\(D\\)\u304c\u8ca0\u306e\u5024\uff1a\u5171\u6709\u70b9\u304c\u306a\u3044<\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/hatsudy.com\/jp\/wp-content\/uploads\/2022\/03\/ydfh2.jpg\" alt=\"\" width=\"463\" height=\"145\" class=\"aligncenter size-full wp-image-4764\" \/><\/p>\n<p>\u305d\u308c\u3067\u306f\u3001\u4ee5\u4e0b\u306e\u554f\u984c\u306e\u7b54\u3048\u306f\u4f55\u3067\u3057\u3087\u3046\u304b\u3002<\/p>\n<ul>\n<li>\\(x^2+4y^2=20\\)\u3068\\(y=x+k\\)\u306b\u3064\u3044\u3066\u3001\u5171\u6709\u70b9\u306e\u500b\u6570\u3092\u6c42\u3081\u307e\u3057\u3087\u3046\u3002\u306a\u304a\u3001\\(k\\)\u306f\u5b9f\u6570\u3067\u3059\u3002<\/li>\n<\/ul>\n<p>\\(y=x+k\\)\u3092\\(x^2+4y^2=20\\)\u306b\u4ee3\u5165\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>\\(x^2+4y^2=20\\)<\/p>\n<p>\\(x^2+4(x+k)^2=20\\)<\/p>\n<p>\\(5x^2+8kx+4k^2-20=0\\)<\/p>\n<p>\u6b21\u306b\u3001\u5224\u5225\u5f0f\u3092\u7528\u3044\u3066\u8a08\u7b97\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>\\(\\displaystyle\\frac{D}{4}=16k^2-5(4k^2-20)\\)<\/p>\n<p>\\(=-4k^2+100\\)<\/p>\n<p>\\(=-4(k^2-25)\\)<\/p>\n<p>\\(=-4(k+5)(k-5)\\)<\/p>\n<p>\u305d\u306e\u305f\u3081\u3001\u7b54\u3048\u306f\u4ee5\u4e0b\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<ul>\n<li>\\(-5&lt;k&lt;5\\)\u306e\u3068\u304d\u3001\u5171\u6709\u70b9\u306f2\u3064<\/li>\n<li>\\(k=-5,5\\)\u306e\u3068\u304d\u3001\u5171\u6709\u70b9\u306f1\u3064<\/li>\n<li>\\(k&lt;-5\\)\u3001\\(5&lt;k\\)\u306e\u3068\u304d\u3001\u5171\u6709\u70b9\u306a\u3057<\/li>\n<\/ul>\n<p>\u3053\u3046\u3057\u3066\u3001\u7b54\u3048\u3092\u5f97\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3057\u305f\u3002\u4e8c\u6b21\u95a2\u6570\u3068\u6bd4\u3079\u3066\u89e3\u304d\u65b9\u306f\u540c\u3058\u306a\u306e\u3067\u3001\u7b54\u3048\u3092\u5f97\u308b\u306e\u306f\u96e3\u3057\u304f\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n<h2>\u5f26\u306e\u4e2d\u70b9\u3068\u9577\u3055\u3092\u8a08\u7b97\u3059\u308b<\/h2>\n<p>\u6b21\u306b\u3001\u5f26\u306e\u4e2d\u70b9\u3092\u7528\u3044\u3066\u9577\u3055\u3092\u8a08\u7b97\u3057\u307e\u3057\u3087\u3046\u3002\u66f2\u7dda\u3068\u76f4\u7dda\u30672\u3064\u306e\u5171\u6709\u70b9\u304c\u3042\u308b\u5834\u5408\u3001\u5f26\u304c\u751f\u6210\u3055\u308c\u307e\u3059\u3002\u4ee5\u4e0b\u306e\u554f\u984c\u306e\u7b54\u3048\u306f\u4f55\u3067\u3057\u3087\u3046\u304b\u3002<\/p>\n<ul>\n<li>\u6955\u5186\\(\\displaystyle\\frac{x^2}{9}+\\displaystyle\\frac{y^2}{4}=1\\)\u3068\u76f4\u7dda\\(y=2x+1\\)\u304c\u4ea4\u308f\u3063\u3066\u3067\u304d\u308b\u5f26\u306e\u4e2d\u70b9\u306e\u5ea7\u6a19\u3068\u5f26\u306e\u9577\u3055\u3092\u6c42\u3081\u307e\u3057\u3087\u3046\u3002<\/li>\n<\/ul>\n<p>\u307e\u305a\u3001\\(y=2x+1\\)\u3092\\(\\displaystyle\\frac{x^2}{9}+\\displaystyle\\frac{y^2}{4}=1\\)\u3078\u4ee3\u5165\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>\\(\\displaystyle\\frac{x^2}{9}+\\displaystyle\\frac{y^2}{4}=1\\)<\/p>\n<p>\\(4x^2+9y^2=36\\)<\/p>\n<p>\\(4x^2+9(2x+1)^2=36\\)<\/p>\n<p>\\(4x^2+9(4x^2+4x+1)=36\\)<\/p>\n<p>\\(40x^2+36x-27=0\\)<\/p>\n<p>\\(x\\)\u3068\\(y\\)\u306e\u5024\u3092\u8a08\u7b97\u3057\u3066\u3082\u3044\u3044\u3067\u3059\u304c\u3001\u8a08\u7b97\u304c\u8907\u96d1\u306b\u306a\u308b\u305f\u3081\u3001\u89e3\u3068\u4fc2\u6570\u306e\u95a2\u4fc2\u3092\u5229\u7528\u3057\u307e\u3057\u3087\u3046\u30022\u3064\u306e\u89e3\u3092\\(\u03b1,\u03b2\\)\u3068\u3059\u308b\u3068\u4ee5\u4e0b\u306e\u95a2\u4fc2\u304c\u6210\u308a\u7acb\u3061\u307e\u3059\u3002<\/p>\n<ul>\n<li>\\(\u03b1+\u03b2=-\\displaystyle\\frac{36}{40}=-\\displaystyle\\frac{9}{10}\\)<\/li>\n<li>\\(\u03b1\u03b2=-\\displaystyle\\frac{27}{40}\\)<\/li>\n<\/ul>\n<p><span style=\"color: #ff0000;\">\u4e2d\u70b9\u306e\\(x\\)\u5ea7\u6a19\u306f\\(\\displaystyle\\frac{\u03b1+\u03b2}{2}\\)\u3067\u3059\u3002<\/span>\u305d\u306e\u305f\u3081\u3001\u5f26\u306e\u4e2d\u70b9\u306e\\(x\\)\u5ea7\u6a19\u306f\\(-\\displaystyle\\frac{9}{20}\\)\u3068\u308f\u304b\u308a\u307e\u3059\u3002\u306a\u304a\\(y=2x+1\\)\u306b\u4ee3\u5165\u3059\u308b\u3068\\(y\\)\u5ea7\u6a19\u304c\u308f\u304b\u308b\u305f\u3081\u3001\u3053\u306e\u5f0f\u306b\\(x=-\\displaystyle\\frac{9}{20}\\)\u3092\u4ee3\u5165\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>\\(y=2\u00d7-\\displaystyle\\frac{9}{20}+1\\)<\/p>\n<p>\\(y=\\displaystyle\\frac{1}{10}\\)<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/hatsudy.com\/jp\/wp-content\/uploads\/2023\/01\/few2.jpg\" alt=\"\" width=\"442\" height=\"314\" class=\"aligncenter size-full wp-image-12438\" \/><\/p>\n<p>\u3053\u3046\u3057\u3066\u3001\u5f26\u306e\u4e2d\u70b9\u5ea7\u6a19\u306f\\(\\left(-\\displaystyle\\frac{9}{20},\\displaystyle\\frac{1}{10}\\right)\\)\u3068\u308f\u304b\u308a\u307e\u3059\u3002<\/p>\n<p>\u306a\u304a\u6955\u5186\u3068\u76f4\u7dda\u306b\u3064\u3044\u3066\u3001\\(x\\)\u8ef8\u306e\u4ea4\u70b9\u306f\\(\u03b1,\u03b2\\)\u3067\u3042\u308b\u305f\u3081\u3001\u4ea4\u70b9\u5ea7\u6a19\u306f\\((\u03b1,2\u03b1+1)\\)\u3068\\((\u03b2,2\u03b2+1)\\)\u3067\u3059\u3002\u305d\u3053\u3067\u3001\u5ea7\u6a19\u3092\u7528\u3044\u3066\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u300c<span>2<\/span>\u3064\u306e\u4ea4\u70b9\u306e\u8ddd\u96e2\u300d\u3067\u3042\u308b\u5f26\u306e\u9577\u3055\u3092\u8a08\u7b97\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>\\(\\sqrt{(\u03b1-\u03b2)^2+\\{(2\u03b1+1)-(2\u03b2+1)\\}^2}\\)<\/p>\n<p>\\(=\\sqrt{(\u03b1-\u03b2)^2+(2\u03b1-2\u03b2)^2}\\)<\/p>\n<p>\\(=\\sqrt{5(\u03b1-\u03b2)^2}\\)<\/p>\n<p>\\(=\\sqrt{5\\{(\u03b1+\u03b2)^2-4\u03b1\u03b2\\}}\\)<\/p>\n<p>\\(=\\displaystyle\\sqrt{5\\left(\\displaystyle\\frac{81}{100}+\\displaystyle\\frac{27}{10}\\right)}\\)<\/p>\n<p>\\(\\displaystyle\\frac{3\\sqrt{195}}{10}\\)<\/p>\n<p>\u3053\u3046\u3057\u3066\u3001\u5f26\u306e\u9577\u3055\u3092\u8a08\u7b97\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3057\u305f\u3002\u4e8c\u6b21\u95a2\u6570\u3068\u4e8c\u6b21\u66f2\u7dda\uff08\u653e\u7269\u7dda\u3001\u6955\u5186\u3001\u53cc\u66f2\u7dda\uff09\u306f\u6027\u8cea\u304c\u540c\u3058\u3067\u3042\u308b\u305f\u3081\u3001\u4e8c\u6b21\u95a2\u6570\u306e\u554f\u984c\u3092\u89e3\u304f\u3068\u304d\u3068\u540c\u3058\u624b\u9806\u306b\u3088\u3063\u3066\u8a08\u7b97\u3067\u304d\u307e\u3059\u3002<\/p>\n<h3>\u5f26\u306e\u4e2d\u70b9\u306e\u8ecc\u8de1\u3092\u7528\u3044\u3066\u4e8c\u6b21\u66f2\u7dda\u3092\u5f97\u308b<\/h3>\n<p>\u6b21\u306b\u3001\u5f26\u306e\u4e2d\u70b9\u306e\u8ecc\u9053\u3092\u7528\u3044\u3066\u4e8c\u6b21\u66f2\u7dda\u306e\u65b9\u7a0b\u5f0f\u3092\u8a08\u7b97\u3057\u307e\u3057\u3087\u3046\u3002\u4e8c\u6b21\u95a2\u6570\u3067\u3082\u4f3c\u305f\u554f\u984c\u3092\u89e3\u3044\u305f\u3053\u3068\u304c\u3042\u308b\u3068\u601d\u3044\u307e\u3059\u304c\u3001\u653e\u7269\u7dda\u3084\u6955\u5186\u3001\u53cc\u66f2\u7dda\u306b\u3064\u3044\u3066\u3082\u8ecc\u9053\u306e\u65b9\u7a0b\u5f0f\u3092\u8a08\u7b97\u3059\u308b\u306e\u3067\u3059\u3002\u305d\u308c\u3067\u306f\u3001\u4ee5\u4e0b\u306e\u554f\u984c\u306e\u7b54\u3048\u306f\u4f55\u3067\u3057\u3087\u3046\u304b\u3002<\/p>\n<ul>\n<li>\u6955\u5186\\(\\displaystyle\\frac{x^2}{9}+\\displaystyle\\frac{y^2}{4}=1\\)\u3068\u76f4\u7dda\\(y=x-k\\)\u304c\u7570\u306a\u308b2\u70b9\u3067\u5171\u6709\u70b9\u3092\u3082\u3064\u3068\u304d\u3001\\(k\\)\u306e\u7bc4\u56f2\u3092\u6c42\u3081\u307e\u3057\u3087\u3046\u3002\u307e\u305f\u3001\u6955\u5186\u3068\u76f4\u7dda\u306e\u5171\u6709\u70b9\u306b\u3088\u3063\u3066\u4f5c\u3089\u308c\u308b\u7dda\u5206\u306e\u4e2d\u70b9P\u306e\u8ecc\u9053\u3092\u8a08\u7b97\u3057\u307e\u3057\u3087\u3046\u3002<\/li>\n<\/ul>\n<p>\u307e\u305a\u3001\\(y=x-k\\)\u3092\\(\\displaystyle\\frac{x^2}{9}+\\displaystyle\\frac{y^2}{4}=1\\)\u306b\u4ee3\u5165\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>\\(\\displaystyle\\frac{x^2}{9}+\\displaystyle\\frac{y^2}{4}=1\\)<\/p>\n<p>\\(4x^2+9y^2=36\\)<\/p>\n<p>\\(4x^2+9(x-k)^2=36\\)<\/p>\n<p>\\(13x^2-18kx+9k^2-36=0\\)<\/p>\n<p>\u6955\u5186\u3068\u76f4\u7dda\u306b\u3088\u3063\u30662\u3064\u306e\u4ea4\u70b9\u304c\u4f5c\u3089\u308c\u308b\u305f\u3081\u3001\u5224\u5225\u5f0f\u3092\u5229\u7528\u3059\u308b\u3053\u3068\u306b\u3088\u3063\u3066\\(k\\)\u306e\u7bc4\u56f2\u304c\u308f\u304b\u308a\u307e\u3059\u3002<\/p>\n<p>\\(\\displaystyle\\frac{D}{4}=81k^2-13(9k^2-36)\\)<\/p>\n<p>\\(=-36k^2+468\\)<\/p>\n<p>\\(=-36(k^2-13)\\)<\/p>\n<p>\\(\\displaystyle\\frac{D}{4}=-36(k+\\sqrt{13})(k-\\sqrt{13})\\)<\/p>\n<p>\u3053\u3046\u3057\u3066\u3001\\(k\\)\u306e\u7bc4\u56f2\u306f\\(-\\sqrt{13}&lt;k&lt;\\sqrt{13}\\)\u3068\u308f\u304b\u308a\u307e\u3057\u305f\u3002\u6b21\u306b\u3001\u6955\u5186\u3068\u76f4\u7dda\u306e\u5171\u6709\u70b9\u306b\u3088\u3063\u3066\u4f5c\u3089\u308c\u308b\u7dda\u5206\u306e\u4e2d\u70b9P\u306e\u8ecc\u9053\u3092\u6c42\u3081\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>2\u3064\u306e\u5171\u6709\u70b9\u306e\\(x\\)\u5ea7\u6a19\u3092\\(\u03b1,\u03b2\\)\u3068\u3059\u308b\u3068\u3001\u89e3\u3068\u4fc2\u6570\u306e\u95a2\u4fc2\u3088\u308a\u3001\\(\u03b1+\u03b2=\\displaystyle\\frac{18k}{13}\\)\u304c\u6210\u308a\u7acb\u3061\u307e\u3059\u3002\u307e\u305f\u70b9P\u306f\u4e2d\u70b9\u3067\u3042\u308b\u305f\u3081\u3001\u70b9P\u306e\\(x\\)\u5ea7\u6a19\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<ul>\n<li>\\(x=\\displaystyle\\frac{\u03b1+\u03b2}{2}=\\displaystyle\\frac{9k}{13}\\)<\/li>\n<\/ul>\n<p>\u306a\u304a\u70b9P\u306f\\(y=x-k\\)\u4e0a\u306b\u5b58\u5728\u3059\u308b\u305f\u3081\u3001\\(x=\\displaystyle\\frac{9k}{13}\\)\u3092\u4ee3\u5165\u3059\u308b\u3068\\(y\\)\u5ea7\u6a19\u3092\u5f97\u3089\u308c\u307e\u3059\u3002<\/p>\n<p>\\(y=x-k\\)<\/p>\n<p>\\(y=\\displaystyle\\frac{9k}{13}-k\\)<\/p>\n<p>\\(y=-\\displaystyle\\frac{4k}{13}\\)<\/p>\n<p>\u6b21\u306b\u3001\\(x=\\displaystyle\\frac{9k}{13}\\)\u3068\\(y=-\\displaystyle\\frac{4k}{13}\\)\u3092\u5229\u7528\u3057\u3066\\(k\\)\u3092\u6d88\u3057\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>\\(y=-\\displaystyle\\frac{4k}{13}\\)<\/p>\n<p>\\(y=-\\displaystyle\\frac{4}{13}\u00d7\\displaystyle\\frac{13}{9}x\\)<\/p>\n<p>\\(y=-\\displaystyle\\frac{4}{9}x\\)<\/p>\n<p>\u3053\u3046\u3057\u3066\u3001\u70b9P\u306b\u3088\u308b\u8ecc\u8de1\u306e\u65b9\u7a0b\u5f0f\u3092\u5f97\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3057\u305f\u3002<\/p>\n<p>\u306a\u304a\\(-\\sqrt{13}&lt;k&lt;\\sqrt{13}\\)\u3067\u3042\u308b\u305f\u3081\u3001\\(-\\displaystyle\\frac{9\\sqrt{13}}{13}&lt;x&lt;\\displaystyle\\frac{9\\sqrt{13}}{13}\\)\u3067\u3059\u3002\u3053\u306e\u7bc4\u56f2\u3067\u306e\\(y=-\\displaystyle\\frac{4}{9}x\\)\u304c\u6b63\u89e3\u3067\u3059\u3002<\/p>\n<h2>\u653e\u7269\u7dda\u3001\u6955\u5186\u3001\u53cc\u66f2\u7dda\u3068\u76f4\u7dda\u306e\u95a2\u4fc2\u3092\u628a\u63e1\u3059\u308b<\/h2>\n<p>\u79c1\u305f\u3061\u304c\u898b\u6163\u308c\u3066\u3044\u308b\u56f3\u5f62\u306b\u4e8c\u6b21\u95a2\u6570\u3084\u5186\u304c\u3042\u308a\u307e\u3059\u3002\u305f\u3060\u3001\u3053\u308c\u3089\u306e\u56f3\u5f62\u306f\u4e8c\u6b21\u66f2\u7dda\uff08\u653e\u7269\u7dda\u3001\u6955\u5186\u3001\u53cc\u66f2\u7dda\uff09\u306e\u7279\u6b8a\u306a\u30b1\u30fc\u30b9\u3067\u3059\u3002\u3064\u307e\u308a\u3001\u4e8c\u6b21\u66f2\u7dda\u306e\u89aa\u621a\u304c\u4e8c\u6b21\u95a2\u6570\u3084\u5186\u3067\u3059\u3002\u305d\u306e\u305f\u3081\u4e8c\u6b21\u95a2\u6570\u3068\u76f4\u7dda\u306e\u95a2\u4fc2\u3092\u5229\u7528\u3057\u3066\u8a08\u7b97\u554f\u984c\u3092\u89e3\u3051\u308b\u5834\u5408\u3001\u4e8c\u6b21\u66f2\u7dda\u3068\u76f4\u7dda\u306b\u95a2\u3059\u308b\u554f\u984c\u3092\u89e3\u304f\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n<p>\u4e8c\u6b21\u66f2\u7dda\u3068\u76f4\u7dda\u306e\u4ea4\u70b9\u5ea7\u6a19\u3092\u5f97\u305f\u3044\u5834\u5408\u3001\u4ee3\u5165\u3059\u308b\u3053\u3068\u3067\u7b54\u3048\u3092\u5f97\u307e\u3057\u3087\u3046\u3002\u307e\u305f\u5171\u6709\u70b9\u306e\u500b\u6570\u3092\u77e5\u308a\u305f\u3044\u5834\u5408\u3001\u5224\u5225\u5f0f\\(D\\)\u3092\u5229\u7528\u3059\u308b\u3068\u3044\u3044\u3067\u3059\u3002<\/p>\n<p>\u307e\u305f\u5f26\u306e\u4e2d\u70b9\u3084\u9577\u3055\u3092\u77e5\u308a\u305f\u3044\u5834\u5408\u3001\u89e3\u3068\u4fc2\u6570\u306e\u95a2\u4fc2\u3092\u5229\u7528\u3057\u307e\u3059\u3002\u3053\u308c\u306b\u3088\u3063\u3066\u8a08\u7b97\u304c\u697d\u306b\u306a\u308a\u307e\u3059\u3002\u307e\u305f\u3001\u4e2d\u70b9P\u306e\u8ecc\u8de1\u306e\u65b9\u7a0b\u5f0f\u3092\u8a08\u7b97\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u3087\u3046\u3002<\/p>\n<p>\u653e\u7269\u7dda\u3001\u6955\u5186\u3001\u53cc\u66f2\u7dda\u3067\u5229\u7528\u3055\u308c\u308b\u65b9\u7a0b\u5f0f\u306f\u7570\u306a\u308b\u3082\u306e\u306e\u3001\u8a08\u7b97\u65b9\u6cd5\u306f\u4e8c\u6b21\u95a2\u6570\u3068\u540c\u3058\u3067\u3059\u3002\u305d\u3053\u3067\u3001\u4e8c\u6b21\u66f2\u7dda\u3068\u76f4\u7dda\u306e\u95a2\u4fc2\u3092\u5229\u7528\u3057\u3066\u8a08\u7b97\u554f\u984c\u3092\u89e3\u3051\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u3087\u3046\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u66f2\u7dda\u3068\u76f4\u7dda\u3092\u7528\u3044\u308b\u3068\u304d\u3001\u4ea4\u70b9\uff08\u5171\u6709\u70b9\uff09\u306e\u5ea7\u6a19\u3092\u8a08\u7b97\u3057\u306a\u3051\u308c\u3070\u3044\u3051\u306a\u3044\u3053\u3068\u306f\u591a\u3044\u3067\u3059\u3002\u305d\u3053\u3067\u653e\u7269\u7dda\u3084\u6955\u5186\u3001\u53cc\u66f2\u7dda\u306b\u3064\u3044\u3066\u3001\u76f4\u7dda\u3068\u306e\u4ea4\u70b9\u3092\u8a08\u7b97\u3067\u304d\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3057\u3087\u3046\u3002 \u306a\u304a\u5171\u6709\u70b9\u306e\u500b\u6570\u3092\u78ba\u8a8d\u3059\u308b\u3068\u304d\u3001\u5224\u5225\u5f0f\\(D\\)\u304c\u6709\u52b9 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[13],"tags":[],"class_list":{"0":"post-12427","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-h-math"},"_links":{"self":[{"href":"https:\/\/hatsudy.com\/jp\/wp-json\/wp\/v2\/posts\/12427","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hatsudy.com\/jp\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/hatsudy.com\/jp\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/hatsudy.com\/jp\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/hatsudy.com\/jp\/wp-json\/wp\/v2\/comments?post=12427"}],"version-history":[{"count":15,"href":"https:\/\/hatsudy.com\/jp\/wp-json\/wp\/v2\/posts\/12427\/revisions"}],"predecessor-version":[{"id":12578,"href":"https:\/\/hatsudy.com\/jp\/wp-json\/wp\/v2\/posts\/12427\/revisions\/12578"}],"wp:attachment":[{"href":"https:\/\/hatsudy.com\/jp\/wp-json\/wp\/v2\/media?parent=12427"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hatsudy.com\/jp\/wp-json\/wp\/v2\/categories?post=12427"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hatsudy.com\/jp\/wp-json\/wp\/v2\/tags?post=12427"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}