jika f (x) = 2x-1 per x +2 dan g (x) = 3x - 2, fungsi (g o f ) (x) =

g(f(x)) = g((2x-1)/(x+2))
3×((2x-1)/(x+2)) -2
(6x - 3)/(x+2) - 2(x+2)/(x+2)
(6x-3)/(x+2) - (2x+4)/(x+2)
(6x-2x-3-4)/(x+2)
(4x - 7)/(x + 2)

(gof)(x) = g(f(x))
= (3 × (2x-1)per(x+2)) - 2
= (6x-3)per(x+2) - 2
= (6x-3-2x-4) per (x+2)
= (4×-7) per (x+2)