受文 [1] 启发 ,并据笔者日常数学教学中积累的材料 ,本文将研究如下更一般的问题 :问题　已知平面内动点 M到点 F和不过 F的定直线 l的距离分别为 d1、d2 ,且 d1+ ed2 =m(e,m为正常数 ) ,求动点 M的轨迹 .以过 F且垂直于 l的直线为 x轴 ,直线 l为 y轴 ,并使 F位于 y轴右侧 ,建 Inspired by the article [1], and according to the materials accumulated in the daily mathematics teaching of the author, this article will study the following more general problems: the distance from the moving point M to the point F and the constant straight line F of the known plane in the problem is respectively d1 , d2, and d1+ ed2 = m (e, m is a normal number), the trajectory of the seek point M. The line that passes F and is perpendicular to l is the x axis, the line l is the y axis, and F is located on the right of the y axis. Side, built