\[f(x) = 6x - 2x^{2} \Longrightarrow ветви\ вниз,\ \]
\[x_{0} = \frac{- 6}{- 4} = 1,5,\]
\[y_{0} = 9 - 4,5 = 4,5 \Longrightarrow \ \ \ (1,5;4,5)\]
\[x\] | \[0\] | \[1\] |
---|---|---|
\[y\] | \[0\] | \[4\] |
\[f(x) > 0\ при\ 0 < x < 3;\]
\[f(x) \leq 0\ \ при\ x \leq 0\ \ \]
\[и\ при\ x \geq 3.\ \]