{"id":789,"date":"2021-09-14T21:37:48","date_gmt":"2021-09-14T13:37:48","guid":{"rendered":"https:\/\/www.xformxp.com\/?p=789"},"modified":"2021-09-14T21:39:19","modified_gmt":"2021-09-14T13:39:19","slug":"%e6%94%bb%e5%87%bb%e5%92%8c%e6%94%bb%e6%ac%a1%e7%9a%84%e5%8f%96%e8%88%8d","status":"publish","type":"post","link":"https:\/\/www.xformxp.com\/?p=789","title":{"rendered":"\u653b\u51fb\u548c\u653b\u6b21\u7684\u53d6\u820d"},"content":{"rendered":"<p>\u8fd9\u51e0\u5929\u91cd\u6253\u6218V\u60f3\u5230\u7684\u8ba1\u7b97<br 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data-katex-display=\"false\">y_1, y_2<\/span><br \/>\n\u5f53A\u7ea7\u6280\u80fd\u4f24\u5bb3\u8f83\u9ad8\u65f6\uff0c\u6709<span class=\"katex-eq\" data-katex-display=\"false\">(x+x_1)(y+y_1)&gt;(x+x_2)(y+y_2)<\/span>\uff0c\u8fd9\u662f\u4e2a\u7ebf\u6027\u4e0d\u7b49\u5f0f\uff0c\u7b80\u5355\u5c55\u5f00<span class=\"katex-eq\" data-katex-display=\"false\">(y_1-y_2)x+(x_1-x_2)y+(x_1y_1-x_2y_2)&gt;0<\/span>\uff0c\u6211\u4eec\u628a\u653b\u51fb\u9ad8\u7684\u6280\u80fd\u653e\u5728\u524d\u9762\u4fdd\u8bc1<span class=\"katex-eq\" data-katex-display=\"false\">x_1-x_2&gt;0<\/span>\uff0c\u5c31\u53ef\u4ee5\u5199\u6210<span class=\"katex-eq\" data-katex-display=\"false\">y&gt;-\\frac{(y_1-y_2)}{x_1-x_2}x-\\frac{x_1y_1-x_2y_2}{x_1-x_2}<\/span><br \/>\n\u56de\u5230\u6211\u4eec\u7684\u4f8b\u5b50\uff0c\u628a\u6570\u636e<span class=\"katex-eq\" data-katex-display=\"false\">x_1=1500, y_1=-8, x_2=200, y_2=12<\/span>\u4ee3\u5165\uff0c\u4e0d\u7b49\u5f0f\u53d8\u6210\u4e86<span class=\"katex-eq\" data-katex-display=\"false\">y&gt;\\frac{x}{65}+11.08<\/span>\u3002\u5927\u591a\u6570\u60c5\u51b5\u4e0b\uff0c\u7531\u4e8e\u6218\u7cfb\u5217\u80af\u5b9a\u662f\u5148\u52a0\u653b\u6b21\u9632\u6b21\u7684\uff0c\u6211\u4eec\u7684\u653b\u51fb\u548c\u602a\u7684\u9632\u5fa1\u4e0d\u4f1a\u5dee\u592a\u591a\uff0c\u53cd\u800c\u653b\u6b21\u4f1a\u9ad8\u51fa\u5f88\u591a\uff08\u653b\u6b21\u4e0d\u9ad8\u4e5f\u6253\u4e0d\u51fa\u4f24\u5bb3\uff09\uff0c\u53ef\u4ee5\u76f4\u63a5\u5c06\u96f6\u70b9\u5904\u7684y\u503c\u4f5c\u4e3a\u4e00\u4e2a\u6807\u51c6\uff0c\u5f53\u6211\u4eec\u7684\u653b\u6b21\u5927\u4e8e\u602a\u7684\u9632\u6b21+11\uff0c\u5c31\u8be5\u5207\u6210A\u7ea7\u6280\u80fd\u8f93\u51fa\u5566\u3002\u5f53\u7136\uff0c\u4f60\u5982\u679c\u60f3\u7b97\u7684\u66f4\u7ec6\u81f4\u4e00\u70b9\u7684\u8bdd\uff0c\u90a3\u8fd9\u4e2a\u503c\u53ef\u80fd\u8fd8\u4f1a\u4e0a\u6d6e\u4e00\u70b9\u70b9\uff0c\u4e0d\u8fc7\u8fd9\u70b9\u5dee\u522b\u57fa\u672c\u53ef\u4ee5\u5ffd\u7565\u4e0d\u8ba1\u4e86\u3002\u53e6\u4e00\u79cdtrivial 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