


\[\boxed{\text{330\ (330).}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[y = \frac{4}{x}\text{\ \ \ \ }\]
| \[x\] | \[1\] | \[2\] | \[4\] | \[- 1\] | \[- 2\] | \[- 4\] |
|---|---|---|---|---|---|---|
| \[y\] | \[4\] | \[2\] | \[1\] | \[- 4\] | \[- 2\] | \[- 1\] |
\[y = x\]
| \[x\] | \[1\] | \[2\] | \[3\] |
|---|---|---|---|
| \[y\] | \[1\] | \[2\] | \[3\] |

\[Ответ:A\ (2;2);\ \ \text{B\ }( - 2;\ - 2).\]

\[\boxed{\text{330.}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[y = - \frac{8}{x}\]
| \[x\] | \[2\] | \[- 2\] | \[4\] | \[1\] | \[- 1\] | \[- 4\] | \[8\] | \[- 8\] |
|---|---|---|---|---|---|---|---|---|
| \[y\] | \[- 4\] | \[4\] | \[- 2\] | \[- 8\] | \[8\] | \[2\] | \[- 1\] | \[1\] |

\[1)\ если\ x = 4 \Longrightarrow \ \ y = - 2;\]
\[если\ x = - 1 \Longrightarrow \ y = 8.\]
\[2)\ если\ y = 2 \Longrightarrow \ \ x = - 4;\]
\[если\ \ y = - 8 \Longrightarrow \ \ x = 1.\]
\[3)\ Функция\ принимает\ \]
\[положительные\ \]
\[значения\ при\ всех\ \]
\[отрицательных\ \text{x.}\]