分类讨论思想在各地的高考试题的考查中时有体现,它是高考的热点,也是难点,对能力有一定的要求.解决这类问题关键是要找到分类的动机,即为什么分类,怎么样分类.本文试结合近几年的高考题型做一个简单的归类总结.一、如何分类、怎么分类1.由参数的变化引起的分类讨论对于含有参数的方程、不等式问题,由于参数取值的不同会导致结果的不同,或对于 Classification of thinking in the examination of the college entrance examination examinations from time to time reflect, it is the hot college entrance examination, but also difficult, there are certain requirements on the ability to solve these problems the key is to find the motivation for classification, that is, why the classification, how the classification This article tries to combine with the recent college entrance examination questions to make a simple summary.First, how to classify, how to classify 1.Classification discussion caused by the change of parameter For the equation containing the parameter, inequality problem, due to the parameter value Differences can lead to different outcomes, or to