Ответ:
\[y = 4x - x²\]
| \[x\] | \[0\] | \[1\] | \[2\] | \[3\] | \[4\] |
|---|---|---|---|---|---|
| \[y\] | \[0\] | \[3\] | \[4\] | \[3\] | \[0\] |

\[4x - x^{2} < 0\]
\[x \in ( - \infty;0) \cup (4; + \infty).\]
\[y = 4x - x²\]
| \[x\] | \[0\] | \[1\] | \[2\] | \[3\] | \[4\] |
|---|---|---|---|---|---|
| \[y\] | \[0\] | \[3\] | \[4\] | \[3\] | \[0\] |

\[4x - x^{2} < 0\]
\[x \in ( - \infty;0) \cup (4; + \infty).\]