Question

Решите уравнение log3(5+2x)=1

Answer 1

$log_3(5+2x)=1\; ;\; \; ODZ:\; \; 5+2x\ \textgreater \ 0\; ,\; x\ \textgreater \ -\frac{5}{2}\; ,\; x\ \textgreater \ -2,5\\\\5+2x=3^1\\\\2x=-2\\\\x=-1$