Question

Вычислите $3log_{2} 3-log_{2}18-log_{2}48$

Answer 1

по свойствам логарифма:
$Alog _{c} B = log_{c}B^A$

$log_{c}B - log_{c}D = log_{c}( \frac{B}{D} )$
$log_{2} \frac{27}{18} - log_{2}48$
$log_{2} \frac{3}{2} * \frac{1}{48}$

$log_{2} \frac{1}{32} = -5$