Jika logaritma 3 = x dan logaritma 5 = y nilai dari logaritma 75 adalah

Log 3 = x
log 5 = y

log 75
= log (3 . 25)
= log 3 + log 25
= log 3 + log 5²
= log 3 + 2. log 5
= x + 2y

Log3 = x
log5 = y
log75 = log(3 x 5²)
= log3 + 2log5
= x + 2y