Question

lg(2x-1)=-1
Решите уравнение

Answer 1

$lg(2x-1)=-1$
$2x-1=10^{-1}$
$2x-1=0.1$
$2x=1+0.1$
$2x=1.1$
$x=1.1:2$
$x=0.55$
отвте: 0.55