jika f(x)=3x-5/2x+7, x=/ 7/2, maka f invers(1) adalah

Bab Fungsi
Matematika SMA Kelas XI

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

f(x) = (3x - 5)/(2x + 7)
f(x) = (-7x - 5)/(2x - 3)
f(1) = (-7 . 1 - 5) / (2 . 1 - 3)
f(1) = -12/-1
f(1) = 12