Tentukan fog and gof jika f(×)=×-2 dan g(×)=-3 ×+2
f(x) = (x – 2)
g(x) = (-3x + 2)
(fog)(x) = f(g(x))
(fog)(x) = f(-3x + 2)
(fog)(x) = (-3x + 2) – 2
(fog)(x) = -3x + 2 – 2
(fog)(x) = -3x + 0
(fog)(x) = -3x
(gof)(x) = g(f(x))
(gof)(x) = g(x – 2)
(gof)(x) = (-3)•(x – 2) + 2
(gof)(x) = -3x + 6 + 2
(gof)(x) = -3x + 8 atau setara dengan (gof)(x) = 8 – 3x