高中数学代数与函数一其他练习题113
题目内容

设变量x,y满足约束条件http://picflow.koolearn.com/upload/papers/g02/20120704/201207041334205252922.png则目标函数z=3x-y的取值范围是  

2021-07-19

A.http://picflow.koolearn.com/upload/papers/g02/20120704/201207041334205491045.png

B.http://picflow.koolearn.com/upload/papers/g02/20120704/201207041334205741010.png

C.[-1,6]

D.http://picflow.koolearn.com/upload/papers/g02/20120704/201207041334205981047.png

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