Question

e) long729=5-2×CALCULE
9 ​

Answer 1

Resposta:

$log_{9}(729) = 5 - 2x \\ {9}^{5 - 2x} = {9}^{3} \\ 5 - 2x = 3 \\ - 2x = 3 - 5 \\ - 2x = - 2 \\ x = \frac{ - 2}{ - 2} \\ x = 1$