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2002 IMO Problems/Problem 5: Revision history

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14 April 2025

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18 November 2023

  • curprev 23:3423:34, 18 November 2023 Tomasdiaz talk contribs 256 bytes +256 Created page with "==Problem== Find all functions <math>f:\Bbb{R}\to \Bbb{R}</math> such that <cmath>(f(x)+f(z))(f(y)+f(t))=f(xy-zt)+f(xt+yz)</cmath> for all real numbers <math>x,y,z,t</math>..."
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