Логарифмы

1. log_a a = 1

2. log_a 1 = 0

3. log_a (bⁿ) = n log_a b

4. log _Aⁿ b = 1/n log_a b

5. log_a b = log _c b/ log _c a

6. log_a b = 1/ log _b a