\[\boxed{\text{385\ (385).}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
Пояснение.
Решение.
\[1)\ \sqrt{2} \approx 1,41\]
\[2)\sqrt{7} \approx 2,65\]
\[3)\ \sqrt{34} \approx 5,83\]
\[4)\ \sqrt{1,8} \approx 1,34\]
\[5)\ \sqrt{2,439} \approx 1,56\]
\[\boxed{\text{3}\text{85}\text{.}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[f(x) = \left\{ \begin{matrix} - x;\ \ \ \ \ \ \ \ \ x < 0 \\ x^{3};\ \ 0 \leq x \leq 2 \\ 8;\ \ \ \ \ \ \ \ \ \ \ \ x > 2 \\ \end{matrix} \right.\ \]
\[1)\ f\left( - \frac{1}{3} \right) = - x = \frac{1}{3};\]
\[f(0) = x^{3} = 0;\]
\[f\left( \frac{1}{6} \right) = x^{3} = \frac{1}{216};\]
\[f(3) = 8.\]
\[2)\]
\[3)\ При\ 0 < a < 8.\]