Question

The function is even when:

Select one:
A. f(x) = f(x) for all x
B. f(x) = f(-x) for all x
C. f(x) = -f(x) for all x
D. All of the option mentioned

Answer 1

The answer is B

A function is even only when $f(x)$ is equal to $f(-x)$ for all values of x