Diketahui fungsi f(x) = 3x – 1 dan g(x) = 2x2 – 3 . Komposisi fungsi (g o f) (x)

(g o f)(x) =g(f(x))
g(x) = 2x^2 - 3
f(x) = 3x - 1

g(3x - 1) = 2 × (3x -1)^2 - 3

(3x - 1)(3x - 1)
= 9x^2 - 3x - 3x + 1
= 9x^2 - 6x + 1

= 2(9x^2 - 6x + 1) - 3
= 18x^2 - 12x + 2 - 3
( g o f )(x) = 18x^2 - 12x - 1