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含绝对值的式子运算的主要思路就是去掉绝对值符号,使得原有的式子转化成一般的算式.含绝对值的式子往往只是作为一些条件出现,在它的身后可能隐藏着一些最值计算,下面看几个较常见的类型.
The main idea of the formula with absolute value operation is to remove the absolute value symbol, so that the original formula into a general formula. Absolute value of the formula is often only as some conditions appear behind it may hide some of the most Value calculation, below to see a few more common types.