Question

Dados log 2 = 0,30; log 3 =0,48 e o log 5= 0,70, calcule: log(15/2)

Answer 1

$log( \frac{15}{2} ) = log(15) - log(2) \\ \\ = log(3 \times 5) - log(2) \\ \\ = log(3) + log(5) - log(2) \\ \\ = 0.48 + 0.70 + 0.30 = 1.48$