{"id":691,"date":"2015-11-04T08:15:12","date_gmt":"2015-11-04T00:15:12","guid":{"rendered":"http:\/\/www.xuehelp.cn\/?p=691"},"modified":"2015-11-04T08:15:12","modified_gmt":"2015-11-04T00:15:12","slug":"%e6%88%91%e5%9b%bd%e4%ba%91%e5%8d%97%e3%80%81%e8%b4%b5%e5%b7%9e%e7%ad%89%e8%a5%bf%e5%8d%97%e5%9c%b0%e5%8c%ba%e9%81%87%e5%88%b0%e6%97%b1%e7%81%be%e4%b8%ba%e5%8f%8a%e6%97%b6%e7%81%8c%e6%ba%89%e5%86%9c","status":"publish","type":"post","link":"http:\/\/www.xuehelp.cn\/index.php\/archives\/691","title":{"rendered":"\u6211\u56fd\u4e91\u5357\u3001\u8d35\u5dde\u7b49\u897f\u5357\u5730\u533a\u9047\u5230\u65f1\u707e,\u4e3a\u53ca\u65f6\u704c\u6e89\u519c\u7530"},"content":{"rendered":"<p>\u4eca\u5e74\u6625\u5b63,\u6211\u56fd\u4e91\u5357\u3001\u8d35\u5dde\u7b49\u897f\u5357\u5730\u533a\u9047\u5230\u65f1\u707e,\u4e3a\u53ca\u65f6\u704c\u6e89\u519c\u7530,\u4e30\u6536\u519c\u673a\u516c\u53f8\u51b3\u5b9a\u652f\u63f4\u4e0a\u576a\u6751\u7532\u4e59\u4e19\u4e09\u79cd\u4e0d\u540c\u529f\u7387\u67f4\u6cb9\u53d1\u7535\u673a\u517110\u53f0\uff08\u6bcf\u79cd\u81f3\u5c11\u4e00\u53f0\uff09\u53ca\u914d\u5957\u76f8\u540c\u578b\u53f7\u62bd\u6c34\u673a4\u53f0\u30013\u53f0\u30012\u53f0,\u6bcf<br \/>\n\u4eca\u5e74\u6625\u5b63,\u6211\u56fd\u4e91\u5357\u3001\u8d35\u5dde\u7b49\u897f\u5357\u5730\u533a\u9047\u5230\u65f1\u707e,\u4e3a\u53ca\u65f6\u704c\u6e89\u519c\u7530,\u4e30\u6536\u519c\u673a\u516c\u53f8\u51b3\u5b9a\u652f\u63f4\u4e0a\u576a\u6751\u7532\u4e59\u4e19\u4e09\u79cd\u4e0d\u540c\u529f\u7387\u67f4\u6cb9\u53d1\u7535\u673a\u517110\u53f0\uff08\u6bcf\u79cd\u81f3\u5c11\u4e00\u53f0\uff09\u53ca\u914d\u5957\u76f8\u540c\u578b\u53f7\u62bd\u6c34\u673a4\u53f0\u30013\u53f0\u30012\u53f0,\u6bcf\u53f0\u62bd\u6c34\u673a\u6bcf\u5c0f\u65f6\u53ef\u62bd\u6c34\u704c\u6e89\u519c\u75301\u4ea9,\u73b0\u8981\u6c42\u6240\u6709\u67f4\u6cb9\u53d1\u7535\u673a\u53ca\u914d\u5957\u62bd\u6c34\u673a\u540c\u65f6\u5de5\u4f5c\u4e00\u5c0f\u65f6,\u704c\u6e89\u519c\u753032\u4ea9<br \/>\n\uff081\uff09\u8bbe\u7532\u79cd\u67f4\u6cb9\u53d1\u7535\u673a\u6570\u91cf\u4e3ax\u53f0,\u4e59\u79cd\u67f4\u6cb9\u53d1\u7535\u673a\u6570\u91cf\u4e3ay\u53f0.<br \/>\n\u2460\u7528\u542bx\u3001y\u7684\u5f0f\u5b50\u8868\u793a\u4e19\u79cd\u67f4\u6cb9\u53d1\u7535\u673a\u7684\u6570\u91cf<br \/>\n\u2461\u6c42\u51fay\u4e0ex\u7684\u51fd\u6570\u5173\u7cfb\u5f0f\uff1b<br \/>\n\uff082\uff09\u5df2\u77e5\u7532\u3001\u4e59\u3001\u4e19\u67f4\u6cb9\u53d1\u7535\u673a\u6bcf\u53f0\u6bcf\u5c0f\u65f6\u8d39\u7528\u5206\u522b\u4e3a130\u5143\u3001120\u5143\u3001100\u5143,\u5e94\u5982\u4f55\u5b89\u6392\u4e09\u79cd\u67f4\u6cb9\u53d1\u7535\u673a\u7684\u6570\u91cf,\u65e2\u80fd\u6309\u8981\u6c42\u62bd\u6c34\u704c\u6e89,\u540c\u65f6\u67f4\u6cb9\u53d1\u7535\u673a\u603b\u8d39\u7528W\u6700\u5c11?<\/p>\n<p><!--more--><\/p>\n<p>\u7532\u79cd\u67f4\u6cb9\u53d1\u7535\u673a\u6570\u91cf\u4e3ax\u53f0,<br \/>\n\u4e59\u79cd\u67f4\u6cb9\u53d1\u7535\u673a\u6570\u91cf\u4e3ay\u53f0,<br \/>\n\u5219\u4e19\u79cd\u67f4\u6cb9\u53d1\u7535\u673a\u6570\u91cf\u4e3a\uff0810 &#8212; x &#8212; y\uff09\u53f0<br \/>\n\uff082\uff09\u7531\u9898\u610f<br \/>\n4x + 3y + 2(10 &#8212; x &#8212; y\uff09 = 32<br \/>\n\u2234y = 12 &#8212; 2x<br \/>\n\u4e19\u79cd\u67f4\u6cb9\u53d1\u7535\u673a\u6570\u91cf\u4e3a 10 &#8212; x &#8212; y = \uff08x &#8211;2\uff09\u53f0<br \/>\nW = 130x + 120(12&#8211;2x) + 100(x &#8211;2)<br \/>\n=1240 &#8211;10x<br \/>\n\u636e\u9898\u610f\u89e3\u4e0d\u7b49\u5f0f\u7ec4\uff1ax\u22651<br \/>\n12 &#8211;2x\u22651<br \/>\nx&#8211;2\u22651<br \/>\n\u89e3\u5f97\uff1a3 \u2264 x \u22645.5<br \/>\n\u2235x\u4e3a\u6b63\u6574\u6570<br \/>\n\u2234 x\u53ef\u53d6\u7684\u503c\u4e3a3,4,5<br \/>\n\u2235W\u968fx\u7684\u589e\u5927\u800c\u51cf\u5c0f,<br \/>\n\u5219\u5f53x\u53d65\u65f6,<br \/>\nW\u6700\u5c11 = 1240 &#8211;10x<br \/>\n= 1240 &#8212; 10 \u00d7 5<br \/>\n= 1190<br \/>\n\u5373\uff1a\u8fd9\u6837\u5b89\u6392\u65e2\u80fd\u6309\u8981\u6c42\u62bd\u6c34\u704c\u6e89,\u540c\u65f6\u67f4\u6cb9\u53d1\u7535\u673a\u603b\u8d39\u7528W\u6700\u5c11<br \/>\n\u5b89\u6392\u7532\u79cd\u67f4\u6cb9\u53d1\u7535\u673a\u6570\u91cf\u4e3a5\u53f0\uff1b<br \/>\n\u5b89\u6392\u4e59\u79cd\u67f4\u6cb9\u53d1\u7535\u673a\u6570\u91cf\u4e3a2\u53f0\uff1b<br \/>\n\u5b89\u6392\u4e19\u79cd\u67f4\u6cb9\u53d1\u7535\u673a\u6570\u91cf\u4e3a3\u53f0.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4eca\u5e74\u6625\u5b63,\u6211\u56fd\u4e91\u5357\u3001\u8d35\u5dde\u7b49\u897f\u5357\u5730\u533a\u9047\u5230\u65f1\u707e,\u4e3a\u53ca\u65f6\u704c\u6e89\u519c\u7530,\u4e30\u6536\u519c\u673a\u516c\u53f8\u51b3\u5b9a\u652f\u63f4\u4e0a\u576a\u6751\u7532\u4e59\u4e19\u4e09\u79cd\u4e0d\u540c\u529f\u7387\u67f4\u6cb9\u53d1 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[288],"_links":{"self":[{"href":"http:\/\/www.xuehelp.cn\/index.php\/wp-json\/wp\/v2\/posts\/691"}],"collection":[{"href":"http:\/\/www.xuehelp.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.xuehelp.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.xuehelp.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.xuehelp.cn\/index.php\/wp-json\/wp\/v2\/comments?post=691"}],"version-history":[{"count":1,"href":"http:\/\/www.xuehelp.cn\/index.php\/wp-json\/wp\/v2\/posts\/691\/revisions"}],"predecessor-version":[{"id":692,"href":"http:\/\/www.xuehelp.cn\/index.php\/wp-json\/wp\/v2\/posts\/691\/revisions\/692"}],"wp:attachment":[{"href":"http:\/\/www.xuehelp.cn\/index.php\/wp-json\/wp\/v2\/media?parent=691"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.xuehelp.cn\/index.php\/wp-json\/wp\/v2\/categories?post=691"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.xuehelp.cn\/index.php\/wp-json\/wp\/v2\/tags?post=691"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}