jika ^2log 3 = a dan ^3log 5 = b maka ^5log 12/5 = ...

jawab

(²log 3 . ³log 5) = a b
²log 5 = ab

⁵log 12/5 = (²log 12/5) / (²log 5) = (²log 12 -²log 5)/(²log 5)
= (²log 2²  + ²log 3 - ²log 5) / (²log 5)
= (2 + a - ab) /(ab)