高二数学题:若实数x,y满足不等式x-y>=0 x+y>=0 x
若实数x,y满足不等式组x>=0 ,y>=0,x+2y
已知实数x,y满足不等式组:2x-y=0,x+2y
设Z=x+y,其中实数x,y满足不等式x+2y>=0,x-y
若实数x,y满足{2x-y>=0,
若实数x,y满足x-y+1>=0,x+y>=0,x
若实数x,y满足x-y+1》=0,x+y>=0,x
若实数X,Y满足不等式组y≤2,x-y≥0,x-2y≤0.则z=x+y的最大值为
已知实数x,y满足不等式2x-y>=0,x+y-4>=0,x
若实数x,y满足不等式组{x+3y-3>=0 2x-y-3=0} 且x+y最大值为9 求m=?
若·z=x+2y,且实数x,y满足不等式组2x-5y-4=0,x+y-2
实数x,y满足{x-y+1>=0;y+1>=0;x+y+1
若实数x,y满足不等式组x-y+1≥0x+y-1≤0y≥0