tolong bantu kak sama cara ngerjakan

Invers fungsi
f(x) = (3 - 4x) / (x + 3)
Jika f(x) = (ax + b) / (cx + d)
Maka
f^-1(x) = (-dx + b) / (cx - a)
a = -4 ; b = 3 ; c = 1 ; d = 3

f^-1(x) = (-3x + 3) / (x + 4)

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