已知实数xy满足(x-1)^2+(y-2)^2=4 不等式2x+3y+m≥0恒成立 m取值范围

已知实数xy满足x+2y 已知实数xy满足 x+y-2 已知实数xy满足x²﹢y²-xy+2x-y+1=0求xy 已知实数xy,满足10x²-2xy+y²+6x+1=0,求x+y 已知实数x,y满足x²+y²-xy+2x-y+1=0 求x y 已知实数x,y满足x^2+y^2=1 求(1-xy)(1+xy)的最大值和最小值 已知x y都是实数 且满足x^2+y^2+xy=1/3,求xy的最大值 已知正实数xy满足x+y=1,求1/(2x+y) +4/(2x+3y)最小值 已知实数X,Y满足根号2X-Y-8+根号X+2y+1=0,求XY. 已知实数x、y满足X2+y2-xy+2x-y+1=0,试求x、y的值 已知实数x,y满足(x2)+(y2)-xy+2x-y+1=0,求x,y的值 已知实数x、y满足X2+y2-xy+2x-y+1=0,试求x、y的值 已知实数x,y满足y=√2x-1+√1-2x +2,求xy的平方根 已知实数xy满足方程x^2+y^2-4x+1=0求y比x的最小值 已知实数x,y满足y=√x-8+√16-2x+1/2,求xy的平方根 已知实数x,y满足x平方+2xy-1=0,求x+y的取值范围. 已知实数x、y满足2x2-7xy+3y2=0,求x：y 已知实数xy满足x方+y方=1求y+2/x+1的取值范围已知实数xy满足x方+y方=1求y+2/x+1的取值范具体步骤啊...