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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