Question

Jika ^2 log 3 = a
^7 log 2 = b
maka ^21 log 224 adalah

Answer 1

2'log 3 = a
7'log 2 = b
7'log 3 = ab
21'log 224 = 7'log 224  / 7'log 21
= (7'log 7 + 7'log 32)/ (7'log 7 + 7'log 3)
=  (1 + 7'log 2^5) / (1+ ab)
= ( 1 + 5 b)/(1+ab)