Jika 2^log 3=x dan 5^log2=y maka 8^log75

²log3 = x
5log2 = y

8log75 = ²log75/²log8
= ²log(5² × 3)/²log2³
= (2ײlog5 + ²log3)/(3ײlog2)
= (2/y + x)/3
= (2 + xy)/3y