设实数X,Y满足x+2y=1(x≤0),则x²+y²的最小值是多少

设实数x,y满足 x>=0 x-2y>=0 x-y-2 设实数x,y满足2x+y≤4,x-y≥-1,x-2y≤2,则z=x+y的最大值为 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x²+4y²+2x-4y+2+0 则x+y= 设实数x,y满足约束条件：x>=2;y>=x;2x+y 设实数x,y满足方程组①x-y-2=0 ③2y-3 设实数x,y满足0 设实数X,Y满足x+2y=1(x≤0),则x²+y²的最小值是多少 设实数x,y满足x+2y=1,x≤0,则x²+y²的最小值为多少? 设实数x,y满足x-y-2≥0,x+2y-4≥0,2y-3≤0(1)2x+y的最小值为 设实数x,y满足x^2+2xy-1=0则x+y的取值范围是 设实数x,y满足x^2+2xy-1=0,则x+y的取值范围是 设实数x,y满足x^2+2xy-1=0,则x+y的取值范围是 设实数X,Y满足X平方+2XY-1=0,则X+Y的取值范围是多少? 设实数x、y满足x+2xy-1=0,则x+y的取值范围是 设实数x,y满足x平方+2xy-1=0,求x+y的取值范围