圆锥曲线的定义是建立其标准方程的基础,也是解题的一把金钥匙,只要涉及题目中有焦点及曲线上一点的连线时,即可考虑能否从定义出发,为解题开阔思路、创造条件。一 The definition of conic curve is the basis for the establishment of its standard equations, but also a golden key to solve the problem, as long as it involves the focus of the topic and the point on the curve of the connection, you can consider whether the definition of starting for the solution to open ideas ,Create conditions. one