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Sigma(r=1)^(oo) tan^(-1) (2/((r +2))) i...

`Sigma_(r=1)^(oo) tan^(-1) (2/((r +2)))` is

A

`pi - ( tan^(-1) 2 + tan ^(-1) 3) `

B

` pi/4`

C

` (7pi)/4`

D

` pi + ( tan^(-1) 2 + tan^(-1) 3)`

Text Solution

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The correct Answer is:
A, B
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