设m=2x-y,式中变量x,y满足条件x+y≤2x−y≥0y≥0
设变量x,y满足约束条件x−y≥0x+y≤1x+2y≥1
设z=2x+y,变量x,y满足条件x−4y≤−33x+5y≤25x≥1
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z=2x+y式中变量x,y同时满足x-4y
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
设变量X,Y满足约束条件{X-Y+3>=0,X+Y>=0,-2
设z=x-y,式中变量x和y满足条件x+y-3≥0x-2y≥0,则z的最小值为___.
变量x,y满足x-2y=0,x
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+y≤2x≥1y≥0
设实数x,y满足条件x≥0x≤yx+2y≤3
设变量x,y满足约束条件{x-y≥0,x+y≤1 x+2y≥1 求z=y/x+1的取值范围 z=(x-1/2)^2+y^