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已知x,y满足不等式组 http://picflow.koolearn.com/upload/papers/20140823/20140823222443973952.png则z="2x" +y的最大值与最小值的比值为

发布时间:2021-07-19

A.http://picflow.koolearn.com/upload/papers/20140823/20140823222444191339.png

B.http://picflow.koolearn.com/upload/papers/20140823/20140823222444363375.png

C.http://picflow.koolearn.com/upload/papers/20140823/20140823222444394389.png

D.2

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