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分类讨论广泛地存在于中学数学的各类问题中,它是一种重要的化难为易,化繁为简的解题策略和方法,体现了化整为零、积零为整的思想.分类讨论的思想在高考试题中占有重要的地位,也是近几年来高考重点考查的热点问题之一.一、为什么要分类讨论在解题中会遇到一些不确定的因素而使得问题所给的对象不能进行统一研究.需要把研究对象按某个标准分类,然后对每一类分别研究得出结论,最后综合各类结果得到整个问题
Category discussion is widely used in all kinds of problems in middle school mathematics, it is an important strategy and method to solve the problem of difficulty, easy to simplify, embodies the idea of rectification to zero and zero to zero. The thinking of the discussion occupies an important position in the entrance examination questions, but also one of the hot issues in the examination of key points in the college entrance examination in recent years.First, why do we need to classify the discussion in the problem-solving will encounter some uncertain factors that make the problem object Can not be unified research.Need to study the object according to a standard classification, and then each type of study to draw conclusions, the final result of the various types of the entire problem