\[y = x\left( 1 - \sqrt{3} \right);\ \ \ \ \ \ \]
\[\left\lbrack 4 - 4\sqrt{3;}\ \ \ \ 2 - 2\sqrt{3\ } \right\rbrack\]
\[\frac{2 - 2\sqrt{3}}{1 - \sqrt{3}}\ \leq x \leq \frac{4 - 4\sqrt{3}}{1 - \sqrt{3}}\]
\[\frac{2 \cdot (1 - \sqrt{3})}{1 - \sqrt{3}} \leq x \leq \frac{4 \cdot (1 - \sqrt{3})}{1 - \sqrt{3}}\]
\[2 \leq x \leq 4\]
\[Ответ:\lbrack 2;\ 4\ \rbrack.\]