# Recurrence relation

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Suppose a sequence satisfies the given recurrence relation and initial conditions. Find an explicit formula for the sequence

s(subk)=-4s(subk-1)-4S(subk-2), for all integers k>or equal to 2

s(sub0)=0,S(sub1)=-1

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##### Solution Summary

This shows how to find an explicit formula for a given sequence.

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