Ответ:
\[y = 0,5x^{2}\]
| \[x\] | \[0\] | \[1\] | \[2\] | \[- 1\] | \[- 2\] |
|---|---|---|---|---|---|
| \[y\] | \[0\] | \[0,5\] | \[2\] | \[0,5\] | \[2\] |

\[y < 2\]
\[0,5x^{2} < 2\]
\[0,5x² - 2 < 0\ \ \ | \cdot 2\]
\[x^{2} - 4 < 0\]
\[(x - 2)(x + 2) < 0\]

\[y = 0,5x^{2}\]
| \[x\] | \[0\] | \[1\] | \[2\] | \[- 1\] | \[- 2\] |
|---|---|---|---|---|---|
| \[y\] | \[0\] | \[0,5\] | \[2\] | \[0,5\] | \[2\] |

\[y < 2\]
\[0,5x^{2} < 2\]
\[0,5x² - 2 < 0\ \ \ | \cdot 2\]
\[x^{2} - 4 < 0\]
\[(x - 2)(x + 2) < 0\]
