设实数X,Y满足2X+Y-2>=0,X-2Y+4>=0,3X-Y
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Z=X+Y,其中X,Y满足X+2Y>=0,X-Y
设实数x,y满足方程9x²+4y²-3x+2y=0,则z=3x+2y的最大值
若实数x,y满足{2x-y>=0,
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满足不等式组{x+2y-5>0 2x+y-7>0 x>=0 y>=0} ,且x,y为整数,则3x+4y的最小
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>=0 x>=y 2x-y
设实数x,y满足x^2+4y^2+2x-4y+2=0,则x+y=?
设实数x、y满足方程2x²+3y²=6y,求x+y的最大值