f(x) =2x+4 g(x) =1/2x ditanya fog-1(x)

f (x) = 2x +4 dan g(x) = 1/2x
fo g (x) = f { g(x) }
= f ( 1/2x)
= 2(1/2x) + 4
= x + 4
misal fog(x) = y, maka
y = x + 4
x = y - 4
fog-1 = x - 4