9. Jika 𝑓(𝑥) = 𝑥2 + 5 dan 𝑔(𝑥) = 2𝑥 + 1, maka (𝑔 ∘ 𝑓)(𝑥) =

9. Jika 𝑓(𝑥) = 𝑥2 + 5 dan 𝑔(𝑥) = 2𝑥 + 1, maka (𝑔 ∘ 𝑓)(𝑥) =

Komposisi Fungsi

f(x) = x² + 5
g(x) = 2x + 1

(gof)(x)
= g (f(x))
= 2 f(x) + 1
= 2(x² + 5) + 1
= 2x² + 10 + 1
= 2x² + 11

∴ (gof)(x) = 2x² + 11