设x、y满足 x+2y-1≥0 x-y+2≥0 2x+y-5≤0 则z=x+y的最大值是(
设x、y满足x+2y-1≥0x-y+2≥02x+y-5≤0则z=x+y的最大值是()A.4B.3C.2D.1...
设x、y满足 x+2y-1≥0 x-y+2≥0 2x+y-5≤0 则z=x+y的最大值是( ) A.4 B.3 C.2 D.1
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