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MathNet 2010 — Part 06 Question 105

Math Olympiad Vault · MathNet 2010 — Part 06

Question 105

Show that
$$
\sum_{i=1}^{n} \frac{a_i}{\sqrt{a_i^4 + 3}} \le \frac{1}{2} \sum_{i=1}^{n} \frac{1}{a_i}
$$
for all positive integers $n$ and positive real numbers $a_1, a_2, \dots, a_n$ satisfying the condition $a_1 a_2 \cdots a_n = 1$.