Jawabanmu

2014-09-11T18:27:17+07:00
A. Log 18
= log (2.3.3)
= log 2 + log 3 + Log 3
= 0,3010 + 0,4771 + 0,4771
= 1,2552

b. Log 21 
= log (3.7)
= log 3 + log 7
= 0,4771 + 0, 8451
= 1,3222

c. log 10,5
= log (21/2)
= log 21 - log 2
= 1,3222 - 0,3010
= 1,0212

d. log 1/7
= log 1 - log 7
= 0 - 0,8451
= -0,8451
kalau yang sederhanakannya bagaimana?
sederhanakan gimana?