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Let f(x)={(tan^(-1)x, , |x|ge1),((x^(2)-...

Let `f(x)={(tan^(-1)x, , |x|ge1),((x^(2)-1)/4, , |x|lt1):}` then domain of f'(x) is

A

`(-oo,oo)~{1}`

B

`(-oo, oo)~{-1}`

C

`(-oo,oo)~{1,-1}`

D

`(-oo,oo)~{-1,0,1}`

Text Solution

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The correct Answer is:
C
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