f(x) is an even function such that f(2) = 4 and f(10) = 20. Which of the following must be true? Could be true? Must be false? Homework Help ✎
I. f(−10) = 20
II. f(−2) = −4
III. f(0) = 0
Even functions have reflective symmetry across the y-axis.
Definition of an even function: f(a) = f(−a)
Must all even functions go through the origin?
Consider the even function: f(x) = x2 + 1.