Kelas 10 Matematika Butuh Cepat sekalian cara jawabnya

Kelas 10 Matematika
Bab Fungsi Komposisi

(fog) (x) = (-5x + 1)/(10x + 15)
f(5x + 4) = (-5x + 1)/(10x + 15)
f(5 . x/5  + 4) = (-5 . x/5 + 1) / (10 . x/5 + 15)
f(x + 4) = (-x + 1)/(2x + 15)
f(x - 4 + 4) = (- (x - 4) + 1)/(2 (x - 4) + 15)
f(x) = (-x + 4 + 1)/(2x - 8 + 15)
f(x) = (-x + 5)/(2x + 7)