Question

Diketahui fungsi f : R dan fungsi g : R -> R ditentukan oleh rumus f(x) = 2x-1 dan g (x) = x² tentukan nilai fungsi (g°f) (1) dan g°f (-2)

Answer 1

(g o f)(x) = g(f(x)) = g(2x - 1) = (2x - 1)^2
(g o f)(1) = (2 . 1 - 1)^2 = 1
(g o f)(-2) = (2(-2) - 1)^2 = (-5)^2 = 25