Question

7 ∊ D (f)
f(7) - f(-7) = ?
if f is an even function

Answer 1

0

Explanation:

if f is an even function, it means that:

f(x) = f(-x) for every x of the domain

So, because 7 is in f's domain, f(7) = f(-7),

and so f(7) - f(-7) = 0