1. Jika Log 2 = a dan log 3 = b maka nilai log 120 adalah..
Penyelesaian
log120 = log10.12
= log 10 + log12
= 1 + log 4.3
= 1 + 2.log2 + log3
= 1 +2a + b
2. nilai 5log4 + 5log150 - 5log 24 adalah..
Penyelesaian
5log4 + 5log150 - 5log 24 = 5log4.150 - 5log 24
= 5log 600 - 5log 24
= 5log 600 : 24
= 5log25
= 2
3.
