已知x,y满足约束条件y≤xx+y≤1y≥−1
若变量x,y满足约束条件x≥−1y≥xx+y≤1
已知实数x,y满足约束条件x−y≤12x+y≤4x≥1
设x,y满足约束条件x+y≤1y≤xy≥−2
设变量x,y满足约束条件x−y≥0x+y≤1x+2y≥1
已知变量x,y满足约束条件1
设变量x,y满足约束条件x+y≤3x−y≥−1y≥1
已知变量x,y满足约束条件x+2y≥22x+y≤44x−y≥−1
若变量x,y满足约束条件x+y≤2x≥1y≥0
(2012•浙江模拟)已知实数x,y满足约束条件2x−y≤0x−3y+5≥0y≥1
(2012•南京二模)已知变量x,y满足约束条件x+y≥2x−y≤1y≤2
已知变量x,y满足约束条件 y≤2 x+y≥1 x-y≤1 则z=3x+y的最大值是
已知实数x,y满足约束条件y≤x,x+y≤1,y≥-1,则z=2x+y的最大值是多少?