\[\boxed{\mathbf{71}.}\]
\[y = 2x - 2\]
\[1)\ y > 0\ при\ x \in (1; + \infty);\]
\[y < 0\ при\ x \in ( - \infty;1).\ \]
\[2)\ y > 2\ при\ x \in (2; + \infty).\]
\[3)\ y < 2\ при\ x \in ( - \infty;2).\]