Friday

January 20, 2017
Posted by **Anonymous** on Saturday, October 29, 2011 at 11:10pm.

- calculus -
**Steve**, Monday, October 31, 2011 at 5:05amI think it should help to notice that

5n^2 + 6n + 3 = 3n^2 + 6n + 3 + 2n^2 = 3(n+1)^2 + 2n^2

So, what you have is just

3/n^2 + 2/(n+1)^2