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If f(x) = cos^(-1) [(1-(log x)^(2))/(1+(...

If `f(x) = cos^(-1) [(1-(log x)^(2))/(1+(log x)^(2))]`, then `f^(')(e) =`

A

1/e

B

does not exist

C

1

D

2/e

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The correct Answer is:
A
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