Ditentukan fungsi-fungsi f,g, dan h sebagai berikut. f(x) = 3x – 1, g(x) = √x, dan h = x² + 2. tentukan :

F(x) = 3x – 1, g(x) = √x , h(x) = x^2 + 2

(f o g)(4) = f(g(4)) = f(√4) = f(2) = 3(2) – 1 = 5

(f o h)(-1) = f(h(-1)) = f((-1)^2 + 2) = f(3) = 3(3) – 1 = 8

(h o g)(3) = h(g(3)) = h(√3) = √3^2 + 2 = 3 + 2 = 5

^ = pangkat

(fog)(x)=3(√x)-1
            = 3√x-1
(fog)(4)=3√4-1
            =3.2-1
            =6-1
            =5

(foh)(x)=3(x²+2)-1
            =3x²+6-1
            =3x²+5
(foh)(-1)=3(-1)²+5
             =3.1+5
             =3+5
             =8

(hog)(x)=(√x)²+2
(hog)(3)=(√3)²+2
             =3+2
             =5