- $ I\\\left( {0;1} \\\right)$.
- $ I\\\left( {\\\frac{1}{3};\\\,\\\frac{2}{3}} \\\right)$.
- $ I\\\left( { - \\\frac{1}{3};\\\,\\\frac{2}{3}} \\\right)$.
- $ I\\\left( {\\\frac{1}{3};\\\, - \\\frac{2}{3}} \\\right)$.