Question

1- Dados log a= 5, log b= 3, calcule
$log(ab)$
2- Dados log a= 5, log c= 2, calcule:

a)
$log( \frac{a}{c})$
b)
$log(a.c)$

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Answer 1

a)

log(a/c) => mesma coisa de log(a) - log(c)

= log(a) - log(c)

= 5 - 2

= 3

b)

log(a . c) => mesma coisa de log(a) + log(c)

= log(a) + log(c)

= 5 + 2

= 7