f(x)=x+3 dan g(x)=2x-1 dari (f°g)-¹(6)

f(x) = x + 3
g(x) = 2x - 1

fog(x)
= f(g(x))
= (2x - 1) + 3
= 2x + 2

fog(x) = 2x + 2
y = 2x + 2
2x = y - 2
x = (y - 2)/2

(fog)-¹(x) = (x - 2)/2
(fog)-¹(6) = (6 - 2)/2
(fog)-¹(6) = 4/2
(fog)-¹(6) = 2

Maaf ya kalo salah