Question

Jika f(x) = x^2 dan (fog)(x) = x^2 - 2x + 1 maka g(3) adalah?

Answer 1

(fog)(x) = x² - 2x + 1
f(g(x)) = x² - 2x + 1
(g(x))² = (x - 1)²
g(x) = x - 1 atau g(x) = 1 - x
nilai g(3) = 3 - 1 = 2
atau g(3) = 1 - 3 = -2