8-2/3-2/15-2/35-2/63-2/99-2/143-2/195-2/255=

分类: 作业答案 • 2021-12-20 11:48:47

问题描述：

答

=8-(1-1/3)-(1/3-1/5)-(1/5-1/7).-(1/15-1/17)
=8-1+1/3-1/3+1/5-1/5.-1/15+1/17
=8-1+1/17=7+1/17
=120/7