Jawabanmu

2014-09-12T17:17:28+07:00
21 log 525= 3 log 525/ 3 log 21
= 3log 25.21/3log21
=3log 25 + 3 log 21 / 3 log 21
= 3log 5^2+3 log 3.7 / 3 log 3.7
=2. 3log 5 + 3log 3 + 3 log 7 / 3 log 3 + 3 log 7
= 2. 1/q + 1 +p / 1+p
=2+q+pq /q+pq