If 2tan^(-1)x+sin^(-1)(2x)/(1+x^2) is in...

If `2tan^(-1)x+sin^(-1)(2x)/(1+x^2)` is independent of `x ,` then `x >1` (b) `x<-1` (c) `0

A

` x in [ -1, +oo) `

B

` x in [-1, 1] `

C

` x in (-oo, -1] cup [1, oo) `

D

None of these

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The correct Answer is:

C

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