设xy满足约束条件 x+y>=1 x-2y>=-2 3x-2y
设xy满足约束条件 x+y>=1 x-2y>=-2 3x-2y
已知xy满足约束条件y=2 2X+y
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+3>=0,X+Y>=0,-2
设xy满足约束条件x≥0,x≥y,2x-y≤1,求z=3x+2y的最大值
设x,y满足约束条件x>=0 x>=y 2x-y
设变量xy满足约束条件x-y≥0,x+y-2≥0,3x-y-6≤0则目标函数z=2x-y
若变量x,y满足约束条件{x>=-1;y>=x;3x+2y
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
xy满足约束条件x-ay-1>=0,2x+y>=0,x-1/2
xy满足约束条件x-ay-1>=0,2x+y>=0,x
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?