tolong bantu saya soal fungsi

Kelas 10 Matematika
Bab Fungsi Komposisi

1] g(x) = 13/(3x - 1)
y (3x - 1) = 13
3xy - y = 13
3xy = 13 + y
x = (y + 13)/3y

g⁻¹ (x) = (x + 3)/3x

2] g⁻¹ (x - 2)
= (x - 2 + 3)/3(x - 2)
= (x + 1)/(3x - 6)