(求轨迹方程)给定两点A(-2,0)和B(2,0),若动点M使直线MA和MB的斜率之乘积等于常数-3,则点M的轨迹方程?
问题描述:
(求轨迹方程)给定两点A(-2,0)和B(2,0),若动点M使直线MA和MB的斜率之乘积等于常数-3,则点M的轨迹方程?
答
设M点的坐标为(x,y)
则(y/(x+2))*(y/(x-2))=-3
x^2/4+y^2/12=1