9. Jika ????(????) = ????2 + 5 dan ????(????) = 2???? + 1, maka (???? ∘ ????)(????) =

9. Jika ????(????) = ????2 + 5 dan ????(????) = 2???? + 1, maka (???? ∘ ????)(????) =

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