Dik: f(×)= 3× + 4 g(×)= 4× - 5/2× + 1 Dit: (fog)^-1 (×)

(fog) = f(g(x))
=f(4x-5/2x+1)
=3(4x-5/2x+1)+4
=20x-11/2x+1

kalo pertanyaannya (fog^-1)= f(g^-1(x))
g(x)=4x-5/2x+1
g^-1(x) = -x-5/2x-4

f(g^-1(x))=f(-x-5/2x-4)
=3(-x-5/2x-4)+4
=5x-31/2x-4