\[f(x) = x^{2} - 2x - 3 \Longrightarrow ветви\ \]
\[вверх.\ \ \]
\[x_{0} = \frac{2}{2} = 1,\]
\[y_{0} = 1 - 2 - 3 = - 4 \Longrightarrow (1;\ - 4).\]
\[x\] | \[0\] | \[- 1\] |
---|---|---|
\[y\] | \[- 3\] | \[0\] |
\[убывает\ на\ \ ( - \infty;1\rbrack;\ \]
\[возрастает\ на\ \ \lbrack 1;\ + \infty).\]