But working modulo $7$, we can compute the sum directly using cyclicity. First, find the pattern of $3^k \mod 7$:

But working modulo $7$, we can compute the sum directly using cyclicity. First, find the pattern of $3^k \mod 7$: - Get link 4share

📅 March 9, 2026 👤 scraface

Mar 09, 2026

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