Jika ²log 3=x dan ⁵log 2=y , maka ⁸log 75....

Jika ²log 3=x dan ⁵log 2=y , maka
⁸log 75 = ²log75/²log8
= ²log(5²×3)/²log2³
= (2ײlog5 + ²log3)/(3ײlog2)
= (2/y + x)/(3×1)
= (2 + xy)/3y