Question

log(0,3)10-log(0,3)3

Answer 1

log(0,3)10-log(0,3)3 =
=log(0,3)10/3 = log(0,3) (3/10)^-1 = -1 log(0,3) 0,3 = -1 *1 = -1

Answer 2

в решении будем использовать формулу 

ответ: -1

Answer 3

This expression is undefined since 0 cannot be used as a base for logarithms.