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分类讨论思想,是中学数学解题中常用的思想方法之一,也是中考数学命题中的热点问题.应用这种思想方法时,要求我们的分类必须做到既不能重复,又不能遗漏.这就要求我们必须掌握好分类的原则和依
The idea of class discussion is one of the common ways of thinking in middle school mathematics problem solving and also a hot issue in the mathematics proposition of senior high school entrance examination.Applying this kind of thinking method requires that our classification must be neither repeated nor omissible. Require us to master the principle of classification and according to