Series (need help!)

[Feynmanfan]

Could anybody help me with this

Σn/[(n+1)(n+2)(n+3)]

Thank you guys!

[arcnets]

I guess the first step is to rewrite this into
A/(n+1) + B/(n+2) + C/(n+3)
where A, B, C are numbers.

[cookiemonster]

http://www.physicsforums.com/showthread.php?t=18630

...?

cookiemonster