设x、y满足约束条件x≥0x≥y2x−y≤1
设变量x,y满足约束条件x−y≥0x+y≤1x+2y≥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≤3x−y≥−1y≥1
.若x、y满足约束条件 x - y +1≥0
设变量x,y满足约束条件 {x-y≥0,x+y≤1,x+2y≥0},则函数Z=2x+y 的最大值?
设实数xy满足线性约束条件x+y≤3 x-y≥1 y≥0
设X,Y满足约束条件X+Y
设x、y满足约束条件{x≥0 y≥x 4x+3y≤12}则2y+3/x+1的取值范围是?
设x y 满足约束条件 x≤0 x≤y 2x-y+1≥0 则z=3x+2y的最大值
若变量x,y满足约束条件x+y≤2x≥1y≥0
设变量x y满足约束条件x-y≥-1 x+y≥1 2x-y≤1 z=(x-2y)/(x+y)的最大值
设x,y满足约束条件x−y+2≥05x−y−10≤0x≥0y≥0