c0,b>0,化简/a-c/+/a-b/+/c-b/
问题描述:
c0,b>0,化简/a-c/+/a-b/+/c-b/
答
/a-c/+/a-b/+/c-b/
如果a>b
=(a-c)+(a-b)+(b-c)
=2a-2c
如果a