Jawabanmu

2014-09-12T19:09:18+07:00
Log 21 = log (3.7) = log 3 + log 7 = 0,4771 + 0,8451 = 1,3222
2014-09-12T19:15:41+07:00
Log 21 = log 3 X log 7 = 0.4771 + 0.8451 = 1.3222