\[\log_2\left(\prod_{a=1}^{2015}\prod_{b=1}^{2015}\left(1+e^{2\pi iab/2015}\right)\right)\]
Putnam 2015/ A3
- Tolaso J Kos
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Putnam 2015/ A3
Compute:
\[\log_2\left(\prod_{a=1}^{2015}\prod_{b=1}^{2015}\left(1+e^{2\pi iab/2015}\right)\right)\]
\[\log_2\left(\prod_{a=1}^{2015}\prod_{b=1}^{2015}\left(1+e^{2\pi iab/2015}\right)\right)\]
Answer
In my opinion, probably the most beautiful question in the competition.Imagination is much more important than knowledge.
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