log a pangkat 2 per b pangkat 2 = 12 , maka log 2 akar b per a =

log a²/b² = 12
log (a/b)² = 12
2 log (a/b) = 12
log (a/b) = 6
log a - log b = 6
log b - log a = -6
log (b/a) = -6

log √(b/a)
= log (b/a)^1/2
= 1/2 . log (b/a)
= 1/2 . (-6)
= -3