设变量x,y满足约束条件x+y≥3x−y≥−12x−y≤3
设变量x,y满足约束条件x+y≤3x−y≥−1y≥1
设变量x,y满足约束条件x−y≥0x+y≤1x+2y≥1
设变量x,y满足约束条件x+y≥3x−y≥−1,则目标函数z=y+2x的最小值为( )
若变量x,y满足约束条件x≥−1y≥xx+y≤1
(2013•青岛二模)设变量x、y满足线性约束条件x+y≥3x−y≥−12x−y≤3,则目标函数z=log7(2x+3y
设变量x,y满足约束条件x-y>-1,x+y>1,3x-y
设变量x,y满足约束条件2x−y≤2x−y≥−1x+y≥1
设变量x,y满足约束条件2x+y≤2,x≥y,y≥-1,则z=-y+3x的最大值为?
设x,y满足约束条件x+y≤1y≤xy≥−2
已知变量x,y满足约束条件x≥0y≥x3x+4y−12≤0
设变量x,y满足约束条件x≥0x−y≥02x−y−2≤0
设变量x,y满足约束条件x+2y−5≤0x−y−2≤0x≥0