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If f(x)=log ((1+x)/(1-x)), then...

If `f(x)=log ((1+x)/(1-x))`, then

A

1)f(x) is even

B

2)`f(x_(1)) . f(x_(2))=f(x_(1)+x_(2))`

C

` 3)(f(x_(1)))/(f(x_(2)))=f(x_(1)+x_(2))`

D

4)` f(x) is odd`

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The correct Answer is:
D
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