设实数x,y满足y+x^2=0,0
设实数x,y满足0
设实数X,Y满足2X+Y-2>=0,X-2Y+4>=0,3X-Y
设Z=x+y,其中实数x,y满足不等式x+2y>=0,x-y
设z=x+y,其中实数x,y满足{x+2y>=0,x-y
设实数x,y满足y+x^2=0,0
设实数X,Y满足约束条件{X+2Y等于-1;Y>等于0,则
若实数x,y满足{2x-y>=0,
设实数x,y满足条件x≥0x≤yx+2y≤3
设实数xy满足X平方+Y平方-2Y=0,则X平方+Y平方的最大值是
设Z=X+Y,其中X,Y满足X+2Y>=0,X-Y
设实数X,Y满足条件X大于等于0,X小于等于Y,X+2Y-4小于等于,则Z=X+Y的最大值是
设实数x,y满足x^2+4y^2+2x-4y+2=0,则x+y=?