Question

Dikethui fungsi komposisi (f ∘g) (x) = 2x²- 1 dan fungsi g(x)= x² -1. Tentukan f(x)

Answer 1

(f ∘g) (x) = 2x²- 1
f(g(x)) = 2x²- 1
f(x² -1) = 2x²- 1
f(x² -1) = 2x²- 2+1
f(x² -1) = 2(x²- 1)+1
misal. x² -1 = p, maka
f(p) = 2p+1
f(x) = 2x+1

semoga membantu yaa.. :)