设变量x,y满足约束条件x?y+2≥0x+y+10≥0x+y?8≤0,则目标函数z=3x-4y的最大值( )A.3B.-3C.11D
设变量x,y满足约束条件x?y+2≥0x+y+10≥0x+y?8≤0,则目标函数z=3x-4y的最大值()A.3B.-3C.11D.-11...
设变量x,y满足约束条件x?y+2≥0x+y+10≥0x+y?8≤0,则目标函数z=3x-4y的最大值( )A.3B.-3C.11D.-11
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