Dik: f(x)=x+2/x-3 , Dit: a). f invers(x) , b). f invers(3)

Kelas 10 Matematika
Bab Fungsi Komposisi

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

a] f (x) = (x + 2)/(x - 3)
f^-1 (x)= (3x + 2)/(x - 1)

b] f^-1 (3)
= (3 . 3 + 2)/(3 - 1)
= (9 + 2)/2
= 11/2
= 5 1/2