f(x)= 3x+7 dan g(x) = 2x+5,jika fog(p) = -2,brp nilai p =

Bab Fungsi Komposisi
Matematika SMA Kelas X

(fog) (x) = f(g(x))
(fog) (x) = f(2x + 5)
(fog) (x) = 3 (2x + 5) + 7
(fog) (x) = 6x + 15 + 7
(fog) (x) = 6x + 22

(fog) (p) = -2
6p + 22 = -2
6p = -2 - 22
p = -24/6
p = -4