Log25 33-log25 55-log25 15

Question

Log25 33-log25 55-log25 15

Answer 1

По свойству логарифмов:
Log25 33-log25 55-log25 15 = Log25 (33/(55*15)) = (1/2)Log5 (1/5*5) =
= (1/2)*(-2) = -1.