3求教各位大神,这道题应该怎么做?最好有过程,谢谢!

2024-12-29 02:21:57
推荐回答(1个)
回答1:

解:原式=(1-1/3+1/3-1/5+1/5-1/7+1/7-1/9+……-1/99+1/99-1/101)×1/2
=(1-1/101)×1/2
=100/101×1/2
=50/101