- #1
Yegor
- 147
- 1
[tex]\sum_{i=1}^{n} \arctan(\frac{1}{2n^2})[/tex]
I have to find sum of first n terms.
I have no idea what to do with these arctan. Give me please any hint.
I have to find sum of first n terms.
I have no idea what to do with these arctan. Give me please any hint.