设x,y,满足约束条件:x+y=0,求使目标函数z=x+1/2y取得最大值的点的坐标

设X,Y满足约束条件X+Y 设x,y满足约束条件x>=0 x>=y 2x-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 y>=x 4x+3y 设变量X,Y满足约束条件{X-Y+3>=0,X+Y>=0,-2 设变量x,y满足约束条件:x-y+3>=0 x+y>=0 -2 设x,y,满足约束条件:x+y=0,求使目标函数z=x+1/2y取得最大值的点的坐标 设x,y满足约束条件x+y>=1,x-y>=-1,2x-y 设x,y满足约束条件x+y>=1,x-y>=-1,2x-y 设x,y满足约束条件{x-y+5≥0,x+y≥0,x≤3}求z=(x+1)^2-y^2的最大值? 实数x,y满足约束条件.求范围实数x,y满足约束条件x-y+2>=0 x+y-4>0x 设实数x,y满足约束条件：x>=2;y>=x;2x+y 设x,y满足约束条件x-4y 设X,Y满足约束条件{X-4Y 设x,y满足约束条件x+y>=a,x-y 设xy满足约束条件x≥0,x≥y,2x-y≤1,求z=3x+2y的最大值 x、y满足的约束条件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?