设实数x，y满足约束条件x-y+2≥0x+y-4≥02x-y-5≤0

设实数x，y满足约束条件x-y+2≥0x+y-4≥02x-y-5≤0 设变量x，y满足约束条件x−y≥0x+y≤1x+2y≥1 设实数X,Y满足约束条件{X+2Y等于-1；Y>等于0,则 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≥0 y≥x 4x+3y≤12｝则2y+3/x+1的取值范围是? 若实数x,y满足约束条件x-y≥0,x+y≥0,2x+y≤1,则y/(x+1)的最大值是多少, 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x，y满足约束条件x≥1且x≠2y≥1x+2y−5≤0，则z＝x+y−1x−2的取值范围为（　　） 若变量x，y满足约束条件x+y≤2x≥1y≥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 设x,y满足约束条件x>=0 x>=y 2x-y