dik f(x) = 2x - 7 dan g(x) = 4 - 3x jika (g o f)(a) = 7,nilai a =

Bab Fungsi Komposisi
Matematika SMA Kelas X

(gof) (x) = g(2x - 7)
(gof) (x) = 4 - 3(2x - 7)
(gof) (a) = 4 - 6a + 21 = 7
-6a = 7 - 25
a = -18 : -6
a = 3