在解析几何中常常出现求定点、定值、定向、定线等问题,它已经成为当前各省高考试题中的热点,它不但可以考查学生掌握知识的水平,更重要的是考查学生灵活运用知识的能力以及解题方法的创新.而许多同学对此陌生 It often appears in the analytic geometry, such as fixed point, fixed value, orientation, alignment and other issues, it has become the hot topic in the current college entrance examination papers, it can not only examine the students grasp the level of knowledge, more importantly, examine the students to apply knowledge flexibly Ability and problem-solving method of innovation, while many students are unfamiliar with this