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设P(x,y)是图中的四边形内的点或四边形边界上的点,则z=2x+y的最大值是http://picflow.koolearn.com/upload/papers/g02/20120916/201209162002332646017.png

发布时间:2021-07-16

A.﹣2

B.﹣1

C.1

D.2

试卷相关题目

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