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RU-ALLRUSSIAN 2021 Problem 112

  • Grade 11

Let P(x)P(x) be a nonzero polynomial of degree n>1n>1 with nonnegative coefficients such that function y=P(x)y=P(x) is odd. Is that possible thet for some pairwise distinct points A1,A2,…AnA_{1}, A_{2}, \dots A_{n} on the graph G:y=P(x)G: y = P(x) the following conditions hold: tangent to GG at A1A_{1} passes through A2A_{2} , tangent to GG at A2A_{2} passes through A3A_{3} , …\dots , tangent to GG at AnA_{n} passes through A1A_{1} ?

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