\[\boxed{\text{349\ (349).\ }\text{Еуроки\ -\ ДЗ\ без\ мороки}}\]
\[f(x) = x - 0,5x^{2}\]
\[x_{0} = \frac{- 1}{- 0,5 \cdot 2} = 1;\]
\[y_{0} = 1 - 0,5 = 0,5.\]
\[Ox:\ \ \ \]
\[x(1 - 0,5x)\]
\[x = 0,\ \ (0;0)\]
\[x = 2,\ \ (2;0)\]
\[\text{Oy}:\ \]
\[y = 0\ (0;0).\]
\[f( - 1) = - 1 - 0,5 = - 1,5.\]
\[1)\ E(y) = ( - \infty;0,5\rbrack.\]
\[2)\ ( - \infty;\ 1\rbrack\]
\[3)\ x \in ( - \infty;0\rbrack\ \cup \lbrack 2;\ + \infty)\]