Diketahui f(x)=x+4 dan g (x) =2x tentukan fog –¹(x)

F(x) = x + 4
f(g(x)) = g(x) + 4 = 2x + 4
2x + 4 = f(g(x)) (cuma dibalik)
2x = f(g(x)) – 4
x = ( f(g(x)) – 4 ) / 2
(f o g)-¹(x) = (x – 4)/2