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2015 Bangladesh Mathematical Olympiad, 3
Tags: number theory , algebra , Bdmo , contests , 2015 Contests , modular arithmetic
Let $n$ be a positive integer.Consider the polynomial $p(x)=x^2+x+1$. What is the remainder of $ x^3$ when divided by $x^2+x+1$.For what positive integers values of $n$ is $ x^{2n}+x^n+1$ divisible by $p(x)$? Post no:[size=300]$100$[/size]