jika f(x)= 5x-3 g(x)= 3x+b dan g(f(1))=8, maka nilai g(1) adalah

f(1) = 5(1) - 3
= 5 - 3
= 2

g(2) = 8
g(2) = 3(2) + b = 8
6 + b = 8
b = 8-6 = 2

g(1) = 3(1) + 2
= 3 + 2
= 5

Semoga Membantu

Mapel : Matematika
Kelas : X SMA
Bab : Fungsi Komposisi dan Fungsi Invers

Pembahasan :
F(x) = 5x - 3
F(1) = 2

G(f(1)) = 8
G(2) = 8
3(2) + b = 8
6 + b = 8
b = 2

G(x) = 3x + 2
G(1) = 3(1) + 2
G(1) = 5