\[\boxed{\text{346.}\text{\ }еуроки - ответы\ на\ пятёрку}\]
\[y = \left\{ \begin{matrix} - x - 2;\ \ x < - 1 \\ 2x + 1;\ \ \ x \geq - 1 \\ \end{matrix} \right.\ \text{\ \ }\]
\[y = m:\]
\[\textbf{а)}\ при\ m < - 1.\]
\[\textbf{б)}\ при\ m = - 1.\]
\[\textbf{в)}\ при\ m > - 1.\]