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2022 SSMO Relay Round 4 Problems/Problem 2

Revision as of 13:11, 14 December 2023 by Pinkpig (talk | contribs) (Created page with "==Problem== The roots of <math>f(x)=x^3+5x+8</math> are <math>r_1,r_2,r_3.</math> Let <math>g_n(x)</math> be a polynomial with roots <math>r_1+n, r_2+n,r_3+n.</math> If<cmath>...")
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Problem

The roots of $f(x)=x^3+5x+8$ are $r_1,r_2,r_3.$ Let $g_n(x)$ be a polynomial with roots $r_1+n, r_2+n,r_3+n.$ If\[S=\sum_{n=1}^{T}(-1)^{n}g_n(5),\]find the remainder when $S$ is divided by 1000.

Solution

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