Question

Найти логарифм, срочно​

Answer 1

$log_{7}( \frac{1}{49} ) = log_{7}( {7}^{ - 2} ) = - 2$

$log_{25}(125) = log_{ {5}^{2} }( {5}^{3} ) = \frac{3}{2}$

$log_{7}(245) - log_{7}(5) = log_{7}( \frac{245}{5} ) = log_{7}(49) = log_{7}( {7}^{2} ) = 2$