Problem Statement

Functional Maze Let f: ℝ → ℝ be a function such that for all real numbers x and y : f(x + y) + f(x - y) = 2 · f(x) · f(y) Given that f(0) ≠ 0 and f(1) = 2 , find the value of f(2) . Pick ONE option A) 5 B) 6 C) 7 D) None of the above Print only the numeric value of f(2).