Jika (fx) = x+2 dan g(x) = 3ײ+ 4x+1 maka (g•f) (f) =

(g•f) (x)= g(f(x))
=g(x+2)
=3(x+2)^2 + 4(x+2) + 1
=3(x^2+4x+4)+4x+8+1
=3x^2+12x+12+4x+8+1
=3x^2+16x+21