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zhong shi fen lei tao lun si xiang de yun yong
Author(s): 
Pages: 26-27
Year: Issue:  3
Journal: Required Reading for Junior Middle School Students

Abstract: <正> 分类讨论思想是一种重要的数学思想方法,下面举例说明如何运用分类讨论思想解题. 例1 化简分析由于 ,因此本题实际上是要化简含有绝对值符号的式子,关键是去掉绝对值的符号.考虑到绝对值符号内代数式值的符号不确定,因此采取“零点划分法”分段讨论,从而得到相应的结果.
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