关于裂项相消的问题

问题描述:

关于裂项相消的问题
3/((6n-5)(6n+1))=1/2(1/6n-5)-(6n+1))
1/2怎么提出来的?

1/(6n-5)(6n+1) =1/6[1/(6n-5)-1/(6n+1)]