jika 3log2=x dan 5log2=y nilai 2 log 75 adalah

3log 2 = x dan 5log 2 = y
2log 75 = log 75/log 2
= log (3.25)/log 2
= (log 3 + log 25)/log 2
= (log 3 + log 5^2)/log 2
= (log 3 + 2.log 5)/log 2 .(ganti bilangan pokok logariitma dengan 2, sehingga,
= (2log 3 + 2.2log 5)/2log 2
= (1/x + 2.1/y)/1
= 1/x + 2/y
= (2x+y)/xy.