设x,y满足约束条件x+y>=1,x-y>=-1,2x-y=7*(a^3b^4)^(1/7)
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>=1,3x-y
设x,y,满足约束条件x+y-2≥3,x-y≥-1,2x-y≤3,若目标函数z=a/x+b/y的最大值为10,则5a+4
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xy满足约束条件 x+y>=1 x-2y>=-2 3x-2y
设x,y满足约束条件x>=0 y>=x 4x+3y
设变量x,y满足约束条件x-y>-1,x+y>1,3x-y
已知x,y满足约束条件:x-y+1>=0,x+y-2>=0,x
定义max{a,b}={a (a>b) ,设实数x,y满足约束条件{|x|≤2,点z={4x+y,3x-y},
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≤0 x≤y 2x-y+1≥0 则z=3x+2y的最大值
设变量X,Y满足约束条件{X-Y+3>=0,X+Y>=0,-2