- #1
utkarshakash
Gold Member
- 854
- 13
Homework Statement
cot^-1 3 + cot^-1 7 + cot^-1 13+...
Homework Equations
The Attempt at a Solution
I first tried to write the nth term of the series
[itex]t_n = cot^{-1}\left( 2^n + (2n-1) \right)[/itex]
Then I tried to calculate the limit as n→∞. But I simply can't do that. I mean I don't know how to calculate the limit.