高中数学代数与函数一其他练习题113
题目内容

设x,y满足约束条件http://picflow.koolearn.com/upload/papers/g02/20120904/201209042101263263978.png,若目标函数z=ax+by(a>0,b>0)的值是最大值为12,则http://picflow.koolearn.com/upload/papers/g02/20120904/201209042101263561175.png的最小值为 

2021-07-19

A.http://picflow.koolearn.com/upload/papers/g02/20120904/20120904210126386920.png

B.http://picflow.koolearn.com/upload/papers/g02/20120904/20120904210126416636.png

C.http://picflow.koolearn.com/upload/papers/g02/20120904/20120904210126450764.png

D.4

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