Jawabanmu

2014-09-12T19:35:45+07:00
³log 21 = ³ log 3.7
= ³log 3 + ³log 7
= a + b
2014-09-12T19:37:26+07:00
Log3=a , log7=b dit: 3log21....? Log21/log3=log3.log7\log3=a.b/a=b