题目 编号:88

已知实数x、y满足http://static.haoxue.com/tk/import/20150823152114/image060.png,则目标函数http://static.haoxue.com/tk/import/20150823152114/image061.png的最大值与最小值的和是(  )",

A.7

B.8

C.9

D.10

答案及解析

答案

C

解析

在直角坐标系内作出可行域如下图所示,又因为http://static.vko.cn/content/tk/import/20150823152114/image062.png,所以由图可知,把点http://static.vko.cn/content/tk/import/20150823152114/image063.png坐标代入http://static.vko.cn/content/tk/import/20150823152114/image064.png的解析式时,http://static.vko.cn/content/tk/import/20150823152114/image064.png有最大值,且http://static.vko.cn/content/tk/import/20150823152114/image065.png.故选:C.http://static.vko.cn/content/tk/import/20150823152114/image066.png

举一反三

举一反三 根据好学网知识点分析,相似的试题还有:
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