Jawabanmu

2014-09-04T21:55:13+07:00
A. log 18 = log3 x log 3 x log 2 = log 3 + log 3 + log 2 = 0.4771 + 0.4771 + 0.3010               = 1,2552
b. log 21 = log 7 x log 3 = log 7 + log 3 = 0.8451+ 0.4771 = 1,3222
(tolong di cek ulang penjumlahannya)