APMO 2018 Problem 5

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samiul_samin
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APMO 2018 Problem 5

Unread post by samiul_samin » Thu Jan 10, 2019 10:58 pm

Find all polynomials $p(x)$ with integer coefficients such that for all real numbers $s$ and $t$ ,if $p(s)$ and $p(t)$ are both integers then $p(st)$ is also an integer.

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