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If S=tan^(-1)(1/3)+tan^(-1)(1/7)+tan^(-1...

If `S=tan^(-1)(1/3)+tan^(-1)(1/7)+tan^(-1)(1/13)+....` to 10 terms. Find `tanS`

A

`(5)/(6)`

B

`(5)/(11)`

C

`-(6)/(5)`

D

`(10)/(11)`

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