Question 60
Prove that
$$x^{2} + \frac{8}{x y} + y^{2} \geq 8.$$
for all positive real numbers $x$ and $y$.
$$x^{2} + \frac{8}{x y} + y^{2} \geq 8.$$
for all positive real numbers $x$ and $y$.
MathNet 2021 — Part 07 Question 60
Math Olympiad Vault · MathNet 2021 — Part 07