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近两年高考中常常出现有关解析几何定值问题.解决这些问题的思维障碍在于:一是定值究竟是什么,其逻辑基础又是什么;二是面对字母运算不得要领,难以找到合理的突破口而陷于繁杂的运算,出现空洞的“兜圈式”的运算.本文试图通过近几年的高考试题的分析,对定值问题的几种类型和对应的解题方法做逐一的介绍,并试图通过这些方法的介绍,使得学生在运算能力,简化运算的策略等方面有所提高.
In the past two years, college entrance examination often appear on the issue of analytical geometric valuation problems to solve these thinking obstacles are: First, what exactly is the value of its logic basis and what is the second is the face of the letter operations can not get the point, it is difficult to find a reasonable Breakthrough in the complicated operation, there is a hollow “roundabout ” operation.This article attempts to pass the analysis of college entrance examination papers in recent years, several types of value problems and the corresponding problem-solving methods to do one by one , And attempts to introduce these methods, enabling students in terms of computing power, simplifying the operation of the strategy has improved.