Вопрос:

Ответ:

\[y = 4x - x²\]

\[x\] \[0\] \[1\] \[2\] \[3\] \[4\]
\[y\] \[0\] \[3\] \[4\] \[3\] \[0\]

\[4x - x^{2} < 0\]

\[x \in ( - \infty;0) \cup (4; + \infty).\]