lim(n to oo)sum(r=1)^(n)cot^(-1)(r^(2)+3...

`lim_(n to oo)sum_(r=1)^(n)cot^(-1)(r^(2)+3//4)` is

A

0

B

`tan^(-1)1`

C

`tan^(-1)2`

D

None of these

Verified by Experts

The correct Answer is:

C

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