Which of the following is an even function :- - Vidyadip

MCQ

Which of the following is an even function :-

A
$f(x) = \log \left( {\frac{{1 - x}}{{1 + x}}} \right)$
B
$f(x) = \left\{ {{x^3} + \sqrt {1 + {x^6}} } \right\}$
✓
$f(x) = \frac{x}{{{2^x} - 1}} + \frac{x}{2} + 1$
D
$f(x) = {e^{5x}} + \sin 7x$

✓

Answer

Correct option: C.

$f(x) = \frac{x}{{{2^x} - 1}} + \frac{x}{2} + 1$

c

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