MCQ

Share

Let ${a_1},{a_2},{a_3}$ be any positive real numbers, then which of the following statement is not true

• A
  $3{a_1}{a_2}{a_3} \le a_1^3 + a_2^3 + a_3^3$
• B
  $\frac{{{a_1}}}{{{a_2}}} + \frac{{{a_2}}}{{{a_3}}} + \frac{{{a_3}}}{{{a_1}}} \ge 3$
• C
  $({a_1} + {a_2} + {a_3})\,\left( {\frac{1}{{{a_1}}} + \frac{1}{{{a_2}}} + \frac{1}{{{a_3}}}} \right) \ge 9$
• ✓
  $({a_1} + {a_2} + {a_3})\,{\left( {\frac{1}{{{a_1}}} + \frac{1}{{{a_2}}} + \frac{1}{{{a_3}}}} \right)^3} \le 27$