已知实数x、y满足x2+4y2=2x+4y-2,求x-2y的平方根.
已知实数x、y满足x2+4y2=2x+4y-2,求x-2y的平方根.
已知实数x,y满足x2+y2-4x+1=0,求2x+y的取值范围?
已知实数x,y满足x2+y2+4x+3=0,求(y-2)/(x-1)的值域.
已知实数x,y满足x2+y2-2x+4y=0,则x2+y2的最小值是
已知实数x,y满足x2+y2-2x+2y=6求x2+y2的最值
如果实数x,y满足等式x2+y2=2x+4y,求2x-y的最小值
已知实数x,y满足x2+y2+2x-4y+5=0
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满足等式x2+y2=4,求x+y的最大值
已知实数x,y满足x2+y2=4,求x+y的取值范围
已知实数x.y满足(x2+y2)(x2+y2-1)=2,求x2+y2的值