Vastaus:
Vastaus on #G (f (18)) = 106 #
Selitys:
Jos #f (x) = 5 / 6x + 5 #
ja #G (x) = 5x + 6 #
Sitten #G (f (x)) = g (5 / 6x + 5) = 5 (5 / 6x + 5) + 6 #
yksinkertaistaminen
#G (f (x)) = 25 / 6x + 25 + 6 = 25 / 6x + 31 #
Jos # X = 18 #
Sitten #G (f (18)) = 25/6 * 18 + 31 = 25 * 3 + 31 = 75 + 31 = 106 #