Question

log de 1/125 na base x = - 3

Answer 1

$Log_x \frac{1}{125} = -3 \\ \\ \frac{1}{125} = x^{-3} \\ \\ \frac{1}{125} = \frac{1}{x^3} \\ multiplica.em.cruz \\ \\ x^3 = 125 \\ x = 5$

Answer 2

Log 1/125 = - 3
      x 

x^-3 = 1/125 ==> x^-3 = 5^-3 ==> x = 5