- $ D = \\\left[ {\\\frac{1}{2}\\\,;\\\,\\\frac{3}{2}} \\\right]$.
- $ D = \\\left( {\\\frac{1}{2}\\\,;\\\,\\\frac{3}{2}} \\\right]\\\backslash \\\left\\\{ 1 \\\right\\\}$.
- $ D = \\\left( { - \\\infty \\\,;\\\,\\\frac{3}{2}} \\\right]\\\backslash \\\left\\\{ 1 \\\right\\\}$.
- $ D = \\\left( { - \\\infty \\\,;\\\,\\\frac{3}{2}} \\\right)$.