- $ S = \\\left( { - \\\infty ;\\\,5} \\\right)$.
- $ S = \\\left( {\\\frac{1}{2};\\\,5} \\\right)$.
- $ S = \\\left( {5;\\\, + \\\infty } \\\right)$.
- $ S = \\\left[ {\\\frac{1}{2};\\\,5} \\\right)$.