已知实数x,y满足:x2+3y2-3=0,求x+y的取值范围.
已知实数x,y满足:x2+3y2-3=0,求x+y的取值范围.
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+y2-4x+1=0,求2x+y的取值范围?
已知实数x,y满足x2+2xy+3y2-8y+6=0,求x,y的取值范围
已知实数x,y满足x2+y2+4x+3=0,求(y-2)/(x-1)的取值范围.
已知实数x,y满足x2+y2+4x+3=0,求x-1分之y-2的取值范围
已知实数x.y满足x2+y2=4.则3x+4y的取值范围是
已知实数xy满足x2+y2-4x+3=0则(x+y-3)/(x-y+1)的取值范围是
实数x,y满足x2+y2=4(y≥0),试求m=(根号3)x+y的取值范围
已知实数xy满足x2+y2=4.则y+3/x+1的取值范围为
已知实数x y满足方程x2+y2+4x+1=0,使ax+y-3≥0恒成立的a取值范围
已知实数x,y满足x2+3y2+6x-12y+21=0,求x,y的值