0>c>-a>b 化简 |c|-|c-b|+|a-c|+|a+b|
问题描述:
0>c>-a>b 化简 |c|-|c-b|+|a-c|+|a+b|
答
0>c>-a>b,则a>0
|c|=-c
|c-b|=-b+c
|a-c|=a-c
|a+b|=-a-b
|c|-|c-b|+|a-c|+|a+b|
=-c-(-b+c)+a-c+(-a-b)
=-c