\[\boxed{\text{268\ (268).}\text{\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[f(x) = \left\{ \begin{matrix} \begin{matrix} 2x + 8,\ \ x \leq - 2 \\ x^{2},\ \ - 2 < x < 2 \\ \end{matrix} \\ - 2x + 8,\ \ x \geq 2 \\ \end{matrix} \right.\ \]
\[y = 2x + 8\]
\[x\] | \[- 2\] | \[- 3\] |
---|---|---|
\[y\] | \[4\] | \[2\] |
\[y = x^{2}\]
\[x\] | \[0\] | \[1\] | \[- 1\] | \[2\] | \[- 2\] |
---|---|---|---|---|---|
\[y\] | \[0\] | \[1\] | \[1\] | \[4\] | \[4\] |
\[y = - 2x + 8\]
\[x\] | \[2\] | \[3\] |
---|---|---|
\[y\] | \[4\] | \[2\] |
\[Нули\ функции:x = - 4,\ x = 0,\]
\[\ x = 4.\]
\[f(x) > 0\ на\ ( - 4;0)\ и\ (0;4).\]
\[f(x) < 0\ на\ ( - \infty;\ - 4)\ и\ \]
\[(4;\ + \infty).\]
\[возрастает\ на\ ( - \infty;\ - 2\rbrack\ и\ (0;2\rbrack.\]
\[убывает\ на\ \lbrack - 2;0)\ и\ \lbrack 2;\ + \infty)\text{.\ }\]