A) \[({{a}_{1}}+{{a}_{2}}+{{a}_{3}})\,\,\left( \frac{1}{{{a}_{1}}}+\frac{1}{{{a}_{2}}}+\frac{1}{{{a}_{3}}} \right)\ge 9\]
B) \[3\,{{a}_{1}}{{a}_{2}}{{a}_{3}}\le a_{1}^{3}+a_{2}^{3}+a_{3}^{3}\]
C) \[({{a}_{1}}+{{a}_{2}}+{{a}_{3}})\,\,{{\left( \frac{1}{{{a}_{1}}}+\frac{1}{{{a}_{2}}}+\frac{1}{{{a}_{3}}} \right)}^{3}}\ge 27\]
D) All of these
E) None of these
Correct Answer: D
Solution :
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