Fungsi f(x) jika g(x) = x+3 dan fog (x) = 2x + 5/x - 6

g(x) = x + 3
fog(x) = 2x + 5/x - 6
f(x) = ?

fog(x) = f [g(x)]
2x + 5/x - 6 = f(x+3)
Dibalik ruasnya biar mudah

f(x+3) = 2x + 5/x - 6
f(x) = 2(x - 3) + 5/(x - 3) - 6
f(x) = 2x - 6 + 5/x - 3 - 6
f(x) = 2x -1/x - 9

Semoga membantu :)