求动点的轨迹方程是解析几何的重要内容之一,也是教学中的一个难点,这部分知识究竟有无规律可循?本文分类介绍几种求轨迹方程的方法。一等式法 1)若问题明确地给出了动点运动过程中所满足的量的关系。那么就把这些量的关系坐标化,列出等式,即得到动点的轨迹方程。这就是所谓“等式法” The trajectory equation of the seeking point is one of the important contents of analytic geometry, and it is also a difficult point in teaching. This part of knowledge has no law to follow. This paper introduces several ways to find the trajectory equation. An equation method 1) If the problem clearly shows the relationship of quantities that are satisfied during the movement of the moving point. Then coordinate the relations of these quantities and list the equations, that is, get the trajectory equations of the moving points. This is the so-called “equal method”