F(x)=8x+7 G(x)=x+4 F●g(x)=?

Bab Fungsi Komposisi
Matematika SMA Kelas X

(fog) (x) = f(x + 4)
(fog) (x) = 8(x + 4) + 7
(fog) (x) = 8x + 32 + 7
(fog) (x) = 8x + 39

(f o g)(x)

"Masukkan g(x) nya ke f(x)" 

8x+7
8(x+4)+7
8x+32+7
8x+39