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pow:problem6s25 [2025/04/29 00:34] mazur |
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| + | <box 85% round orange| Problem 6 (due Monday, April 28 )> | ||
| + | Prove that if $a,b,c$ are positive numbers such that $abc=1$ then | ||
| + | |||
| + | \[ \frac{1}{\sqrt{1+2024a}}+\frac{1}{\sqrt{1+2024b}}+\frac{1}{\sqrt{1+2024c}}\geq\frac{1}{15}.\] | ||
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| + | </box> | ||
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| + | We received a solution from Emily (Qingyue) Liu, Josiah Moltz, and Andrew Zhou (a high school senior from Cincinnati, OH). | ||
| + | Andrew's solution is based on a certain general result in elementary inequalities called the N-1 Equal Value Principle. The solution from Josiah Moltz is perhaps the simplest of all the solutions we have. | ||
| + | For details and other solutions see the following link {{:pow:2025sproblem6.pdf|Solution}}. | ||