1.

If Y = "tan"^(-1)((1)/(1 + x + x^2)) + "tan"^(-1) (1/(x^2 + 3x + 3)) + "tan"^(-1)(1/(x^2 + 5x + 7)) + ….+ upto n term then y^1(0) =

Answer»

`(-1)/(1 + N^2)`
`(-n^2)/(1 + n^2)`
`(n^2)/(1 + n^2)`
`n`

ANSWER :B


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