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解形如|x-a|+|x-b|=2c(2c>b-a>0)或|x-a|-|x-b|=±2c(b-a>2c>0)的方程,一般用分段讨论法、函数图象法或用其它方法求解.下面介绍一种简便的解法——中心对称法.
An equation that solves a shape such as |xa|+|xb|=2c(2c>ba>0) or |xa|-|xb|=±2c(ba>2c>0) Method or using other methods to solve. Here is a simple solution - center symmetry method.