If rational number a,b,and c satisfy a<b<c,then|a-b|+|b-c|+|c-a|﹦?
问题描述:
If rational number a,b,and c satisfy a<b<c,then|a-b|+|b-c|+|c-a|﹦?
答
a<b<c
|a-b|+|b-c|+|c-a|﹦
=-(a-b)-(b-c)+(c-a)
=2c-2a