Question

Questão 3: Dados: log a = 5 e log c = 2, calcule: a) log (a/c) b) log ( a . c )

Answer 1

$\boxed{\begin{array}{l}\rm 3)~\sf \ell oga=5~~\ell ogc=2\\\tt a)~\sf \ell og\bigg(\dfrac{a}{c}\bigg)=\ell oga-\ell ogc=5-2=3\\\tt b)~\sf \ell og(a\cdot c)=\ell oga+\ell ogc=5+2=7\end{array}}$