\[f(x) = x^{2} - 2x - 3 \Longrightarrow ветви\ \]
\[вверх.\ \ \]
\[x_{0} = \frac{2}{2} = 1,\ \ \]
\[y_{0} = 1 - 2 - 3 = - 4 \Longrightarrow (1;\ - 4).\]
\[x\] | \[0\] | \[- 1\] |
---|---|---|
\[y\] | \[- 3\] | \[0\] |
\[f(x) < 0\ \ при\ \ \ \ - 1 < x < 3;\]
\[f(x)\ \geq 0\ \ при\ \ x \leq - 1\ и\ x \geq 3.\ \]