TUGAS 4 MATEMATIKA MINAT
Contoh Soal : Tentukan nilai a jika grafik fungsi f (x) = a× melalui titik : • P = ( 2,14 ) • Q = ( 3,8 ) Penyelesaian : • P = ( 2,14 ) P (2, 1/4 ) -> x = 2 dan y = f (x) = 1/4 f (x) a× <-> a² = 1/4 <-> a² = (1/2) ² <-> a =1/2 • Q = ( 3,8 ) Q ( 3,8 ) -> x = 3 dan y = f (x) = 8 f (x) = a× <-> a³ = 8 <-> a³ = 2³ <-> a = 2