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分类讨论是解初中数学题一种重要的方法.此方法一方面将复杂的问题分解成若干个简单的问题,有助于问题的解决;另一个方面,恰当进行分类,避免了以偏盖全、丢值漏解.那么,何时需要分类讨论呢?
Classification discussion is an important method to solve junior high school mathematics problems. This method divides complex problems into several simple problems and helps solve the problems. On the other hand, it classifies properly and avoids covering all aspects. Loss of value is missing. So, when do you need to discuss in class?