diketahui 5log3=m dan 3log 4=n maka 15log 12=

5 3
log 3 = m log 4 = n


3 3 3
15 log 12 log 3 + log 4
log 12 = ______ = ____________
3 3
log 15 log 3 + 3 log 5
1 + n
= _____
1 + 1/m

= 1 + n ÷ (m + 1)/m
m (1 + n)
= _______
m + 1