Tanya dong sama pembahasan ya

Bab Fungsi Komposisi
Matematika SMA Kelas X

f(x) = (ax + b) / (cx + d)
f⁻¹ (x) = (-dx + b) / (cx - a)

f(x) = (x - 3) / (2x + 1)
f⁻¹ (x) = (-x - 3) / (2x - 1)
f⁻¹ (x) = (- (x + 3) / (- (1 - 2x))
f⁻¹ (x) = (x + 3) / (1 - 2x)

jawabannya B