Diket : log 2 = 0,3010 dan log 3 = 04771 tentukan nilai dari log 15 dan 9

Materi : Logaritma
Kelas : X SMA

log 2 = 0,3010
log 3 = 0,4771

log 15 = log ( 3 × 10/2)
log 15 = log 3 + log 10/2
log 15 = log 3 + log 10 - log 2
log 15 = 0,4771 + 1 - 0,3010
log 15 = 1,1761

log 9 = log (3 × 3)
log 9 = log 3 + log 3
log 9 = 0,4771 + 0,4771
log 9 = 0,9542

*Done !