设实数x,y满足方程组①x-y-2=0 ③2y-3
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
已知实数x y满足不等式方程组2x+y-2>=0.x-2y+4>=0,3x-y-3
设实数x、y满足方程2x²+3y²=6y,求x+y的最大值
设实数x,y满足条件x≥0x≤yx+2y≤3
实数a满足什么条件,二元一次方程组①x-2y=8 ②3x+2y=4a的解满足x>y?
设实数x,y满足y+x^2=0,0
设实数x,y满足方程9x²+4y²-3x+2y=0,则z=3x+2y的最大值
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X^2+Y^2=1,则3X+4Y的最大值为多少