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- $ D = \\\left( {\\\frac{5}{2};9} \\\right]$.
- $ D = \\\left( {\\\frac{5}{2};9} \\\right)$.
- $ D = \\\left[ {\\\frac{5}{2};9} \\\right)$.
- $ D = \\\left[ {\\\frac{5}{2};9} \\\right]$.