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luni, 25 august 2025

Best Mathematics Problems, Thiago Durado, https://www.facebook.com/photo?fbid=24335162042815456&set=gm.977136487730248&idorvanity=569006668543234

 


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F.B. page of Erdem Balkan, https://www.facebook.com/photo?fbid=24428580853509491&set=a.949297615197812

 My solution courtesy of Master Alin Pop solution to the nice lemma used for this purpose attached: