Cara mencari Invers, Jika F(X) = (2X+4)/5 maka F-1 (2) =

Mapel : Matematika
Kelas : X SMA
Bab : Fungsi Komposisi dan Fungsi Invers

Pembahasan :
F(x) = (2x + 4)/5

Inversnya...
F(x) = y
(2x + 4)/5 = y
2x + 4 = 5y
2x = 5y - 4
x = (5y - 4)/2
F^-1(x) = (5x - 4)/2

F^-1(2) = (5.2 - 4)/2
F^-1(2) = (10 - 4)/2
F^-1(2) = 6/2
F^-1(2) = 3