tentukan invers fungsi dari f (x) = 4 / x -3

^ = pangkat
Misal f^-1(x) = y

y = 4/(x-3)
y.(x-3) = 4
xy - 3y = 4
xy = 4 + 3y
x = (4+3y)/y

Kita ubah x→f^-1 dan y→x
x = (4+3y)/y
f^-1(x) = (4+3x)/x