设实数x,y满足3x^2+2y^2=6,x^2+y^2的取值范围

设实数x、y满足方程2x^2+3y^2=6y,求x+y的最大值 设实数x、y满足方程2x²+3y²=6y,求x+y的最大值 设实数x,y满足方程组①x-y-2=0 ③2y-3 设实数x,y满足 x>=0 x-2y>=0 x-y-2 设实数x,y满足约束条件：x>=2;y>=x;2x+y 设实数X,Y满足2X+Y-2>=0,X-2Y+4>=0,3X-Y 设正实数x,y满足x^3+y^3=x-y,求证：x^2+4y^2 设实数x、y满足方程2x2+3y2=6y,则x+y的最大值 设实数X,Y满足X^2+Y^2=1,则3X+4Y的最大值为多少 设实数X、Y满足（X-2）²+Y²=3,那么Y/X的最大值是? 设实数x,y 满足x²+4y²+2x-4y+2+0 则x+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和y满足约束条件,x+y≤10,x-y≤2,X≥4,则Z=2x+3y的最小值为? 设实数x.y满足3x^2+2y^2 设实数x,y满足3x^2+2y^2 设实数x,y满足y+x^2=0,0 设实数x.y满足y+x^2=0,若0