1.

The sum of series sec^(-1)sqrt(2)+"sec"^(-1)(sqrt(10))/3+"sec"^(-1)(sqrt(50))/7+…………..+sec^(-1)sqrt(((n^(2)+1)(n^(2)-2n+2))/((n^(2)-n+1)^(2))) is

Answer»

`TAN^(-1)1`
`tan^(-1)n`
`tan^(-1)(n+1)`
`tan^(-1)(n-1)`

ANSWER :B::C::D


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