Question

Responda: * log81 (raizquadrada 243) é igual a: a)5/8 b)8/5 c)5/4 d)4/5 e)3

Answer 1

Oie, Td Bom?!

■ Resposta: Opção A.

$= log_{81}( \sqrt{243} )$

$= log_{3 {}^{4} }(3 {}^{ \frac{5}{2} } )$

$= \frac{ \frac{5}{2} }{4} \: . \: log_{3}(3)$

$= \frac{ \frac{5}{2} }{4} \: . \: 1$

$= \frac{5}{8}$

Att. Makaveli1996