已知实数x,y满足x^2+y^2-2y=0,求2x+y的取值范围.
已知实数x,y 满足x^2+y^2=1,求(y-2)/(x+1)的取值范围
已知实数x,y满足x^2+y^2=1,求(y+2)/(x+1)的取值范围.
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x^2y^2=2x 求x^2y^2取值范围
已知实数x,y满足x^2+y^2=2x,求x^2y^2取值范围
已知实数x,y满足x^2+y^2-2y=0,求2x+y的取值范围.
已知实数x,y满足x²+y²-2y=0,(1)求2x+y的取值范围
已知实数x,y满足x²+y²=1.求x²-4x+y²+2y的取值范围,求详解,
已知实数x,y满足x^2+(y-1)^2=1,求使不等式x+y+m>=0恒成立实数m的取值范围
已知实数x,y 满足y=根号(3-x²).试求m=(y+1)/(x+3),b=2x+y的取值范围
已知实数x,y满足{x≧0 y≧x 4x+3y≦12}.z=2y+3/x+1 的取值范围
已知实数x,y满足x^2+y^2-2X=0,求(Y+2)/(X+1)的取值范围?