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8 log 9 =a --> 3log 4= ...
kita sederhanakan yang
8 log 9 = a
2^{3} log 3^{2} = a
2/3 . 2 log 3 =a
2log 3 = (3/2) a
-----------------------------------
3 log 4 = 3 log 2^{2}
= 1 + 3log 2
= 1 + 1 / [(3/2) a]
= 1 + [(2a) /3]
= (3 + 2a) / 3
semoga membantu