Question 119
Find all prime numbers $p$ such that
$$
(x+y)^{19}-x^{19}-y^{19}
$$
is a multiple of $p$ for any positive integers $x, y$.
$$
(x+y)^{19}-x^{19}-y^{19}
$$
is a multiple of $p$ for any positive integers $x, y$.
MathNet 2020 — Math Olympiad Vault — Part 04 Question 119
Math Olympiad Vault · MathNet 2020 — Math Olympiad Vault — Part 04