求动点的轨迹方程是解析几何的两类基本问题之一,所用方法丰富多样,是高考重点考查的知识点·本文归纳求解这类问题的常用方法,并举例加以说明·一、直接法根据题设条件,可以直接列出关于动点的等式,从而获解·其解题的一般步骤是:(1)建立适当的坐标系,设出动点及有关点的坐标; The trajectory equation of the solution point is one of the two basic problems of analytical geometry. The methods used are rich and varied, and they are the key points for examination in the college entrance examination. This article summarizes commonly used methods for solving such problems and gives examples to illustrate them. Under the conditions of the title, the equations about the moving points can be listed directly, and the general steps for solving the problem are: (1) establish an appropriate coordinate system and set the coordinates of the moving point and related points;