Uploaded February 2021 | Updated September 2026, 1 day ago
Let p(x) be a polynomial and let p_n(x) be the composition of p with itself n times. We show that the polynomial p(x)-x always divides the polynomial p_2021(x)-2p_2020(x)+p_2019(x).
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Let p(x) be a polynomial and let p_n(x) be the composition of p with itself n times. We show that the polynomial p(x)-x always divides the polynomial p_2021(x)-2p_2020(x)+p_2019(x).
Let me know if you think the video quality is good enough. I'll keep looking for solutions. If you have a webcam that you know works, please let me know!
