Jika f(x) = 2x², g(x) = 3x+1, dan h(x) = √x maka (f•g•h) (x) adalah

(f•g•h) (x) 》 masukkan nilai h(x) ke g (x) dan nilai g(h(x)) dimasukkan ke f(x)

g(h(x)) = 3(akar x) + 1
= akar 9x + 1

fogoh (x) = fog(h(x))
= 2 ( (akar 9x) + 1 )^2
= 2 ( 9x + 2.akar 9x + 1)
= 18x + 4.akar9x + 2

f (x) = 2x²  ; g (x) = 3x + 1  ; h (x) = √x

(fogoh)(x) = f (g (h(x)))
                  = f (g (3√x + 1)
                  = 2 (3√x + 1)²
                  = 2 (9x + 6√x + 1)
                  = 18x + 12√x + 2