Diketahui (g o f) (x) = 6 - 6x. Jika f(x) = 2x + 3, tentukan: a. g(x) b. (f o g) (x) tolong di jawab pliss, mw dikumpulin

Kelas 10 Matematika
Bab Fungsi Komposisi

a] (gof) (x) = 6 - 6x
g (2x + 3) = 6 - 6x
g (2 . x/2 + 3) = 6 - 6 . x/2
g (x + 3) = 6 - 3x
g (x - 3 + 3) = 6 - 3 (x - 3)
g (x) = 6 - 3x + 3
g (x) = 9 - 3x

b] (fog) (x)
= f (9 - 3x)
= 2 (9 - 3x) + 3
= 18 - 6x + 3
= 21 - 6x