diketahui f(x) =x+5,g(x) =2x maka (fog)-¹ adalah

f(x) = x+5
g(x) = 2x
*cari dulu (fog)
(fog)(x) = f(g(x))
= f(2x)
= (2x) + 5
= 2x+5
maka, (fog)-¹ :
(fog)(x) = 2x+5
y = 2x+5
y-5 =2x
y-5/2 =x
jadi, (fog)-¹ = x-5/2


semoga membantu:)