Jawabanmu

2014-08-22T10:27:27+07:00
2log 3 = a
4log 81 = ?

3log 81 / 3 log 4
= 3log 3^4 / 3 log 2^2
= 4 3log 3 / 2 3log2
= 4 / 2 (1/a)
= 4a / 2
= 2a