Functions Question 556

Question: The function $ f(x)=\log (x+\sqrt{x^{2}+1}) $ , is

[AIEEE 2003; MP PET 2003; UPSEAT 2003]

Options:

A) An even function

B) An odd function

C) A Periodic function

D) Neither an even nor odd function

Show Answer

Answer:

Correct Answer: B

Solution:

$ f(x)=\log (x+\sqrt{x^{2}+1}) $ and $ f(-x)=-\log (x+\sqrt{x^{2}+1}) $ $ =-f(x) $ $ f(x) $ is odd function.