Question

é urgente
log de 16=-2 na base x

Answer 1

$log_x16=-2\\ \\ x^{-2}=16\\ \\ \frac{1}{x^2}=16\\ \\ 16x^2=1\\ \\ x^2=\frac{1}{16}\\ \\ x=\sqrt{\frac{1}{16}}\\ \\ x=\frac{1}{4}$