Question

log(3)15-log(3)5+3^log(3)5

Answer 1

$log_315-log_35+3^{log_35}=log_3 frac{15}{5} +5=log_33+5=1+5=6$

Свойства логарифмов:
$1)~ log_ab-log_ac=log_a frac{b}{c} \ 2)~ a^{log_ab}=b$