Question

log ( x + 8 ) – log ( x – 1 ) = 1

Answer 1

Resposta:

$\textsf{Leia abaixo}$

Explicação passo a passo:

$\mathsf{log\:(x + 8) - log\:(x - 1) = 1}$

$\mathsf{log\:\dfrac{x + 8}{x - 1} = log\:10}$

$\mathsf{\dfrac{x + 8}{x - 1} = 10}$

$\mathsf{x + 8 = 10x - 10}$

$\mathsf{9x = 18}$

$\boxed{\boxed{\mathsf{x = 2}}}$