Exercício sobre definição de logaritmo

Calcular os seguintes logaritmos:

$\,log_{{}_{\Large \,4\,}}16\,$

$\,log_{{}_{\Large \,3\,}}\dfrac{1}{9}\,$

$\,log_{{}_{\Large \,81\,}}3\,$

$\,log_{{}_{\Large \,\frac{1}{2}\,}}8\,$

$\,log_{{}_{\Large \,7\,}}\dfrac{1}{7}\,$

$\,log_{{}_{\Large \,27\,}}81\,$

$\,log_{{}_{\Large \,125\,}}25\,$

$\,log_{{}_{\Large \,\frac{1}{4}\,}}32\,$

$\,log_{{}_{\Large \,9\,}}\dfrac{1}{27}\,$

$\,log_{{}_{\Large \,0,25\,}}8\,$

$\,log_{{}_{\Large \,25\,}}0,008\,$

$\,log_{{}_{\Large \,0,01\,}}0,001\,$

resposta: a) 2 b) -2 c) 1/4 d) -3 e) -1 f) 4/3 g) 2/3 h) -5/2 i) -3/2 j) -3/2 k) -3/2 l) 3/2
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