a Prove that if ged(a, m); 1 and gcd (a-1, m)=1 then 1+a+a² + ... + 1) = 0 (mod m). (Hint: What do you get when you multiply the congruence by a-1?)

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Q: PLS HELP ASAP ON ALL ASKED QUESTIONS PLS

A: 11. Option D is correct answer 12) Option D is correct answer Explanation:

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A: I gave a clear written solution below, please refer that.Explanation:

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Q: PLS HELP ASAP ON ALL ASKED QUESTIONS PLS

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