log (a^k) b^n = n/k * log(a) b
log(a) a = 1
ⁿ√aˣ = a^(x/n)
log(⁷√11) 11 = log(11^1/7) 11 =смотрим 1 и 3 cтроки = 7 log(11) 11 = 7
