invers fungsi f (x) = 2x-3, y ≠4 ------- x-4

F u n g s i
I n v e r s

f(x) = (2x - 3) / ( x - 4)
y = (2x - 3) / (x - 4)
xy - 4y = 2x - 3
xy - 2x = -3 + 4y
x(y - 2) = 4y - 3
x = (4y - 3) / (y - 2)

f^-1(x) = (4x - 3) / (x - 2) , x ≠ 2