LOGa500 - LOGa4, якщо LOG5A=1/4 помогите строчно!!!!

Ответ
Очень странная запись.
Если так:
log(a) 500 - log(a) 4 =
= log(a) 500\4 =
= log(a) 125 =
= log(a) 5^3 =
= 3*log(a) 5
и если
log(5) a = 1\4 => a = 5^(1\4) =>
3*log(a) 5 =
= 3*log{5^(1\4)} 5 =
= [3\(1\4)] * log(5) 5 =
= 12