Question

log de 1/5 na base 125

Answer 1

-1/3
125=5³
1/5=5 elevado a -1

Answer 2

$\log \frac{1}{5} ~=~x\\~~~~~~125$

$125^{x}= \frac{1}{5} \\ \\125^{x}=5^{-1}\\(5^{3})^{x}=5^{-1}\\ \\3x=-1\\ \\x=- \frac{1}{3}$