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

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

A

1) `(f (x) + alpha)/(1+ alpha f (x))`

B

2) `((alpha -1) f (x) + alpha +1)/((alpha +1) f (x) + (alpha -1))`

C

3) `((alpha +1 ) f (x) + alpha -1)/((alpha -1) f (x) + (alpha +1))`

D

4) `(f(alpha x ) -1)/(f (alpha x) +1)`

Verified by Experts

The correct Answer is:

C

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