6 5. (25 points) Let n be an integer. Prove that if 3 does not divide n’ – 1, then 3 divides n.
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6 5. (25 points) Let n be an integer. Prove that if 3 does not divide n’ – 1, then 3 divides n.
6 5. (25 points) Let n be an integer. Prove that if 3 does not divide n’ – 1, then 3 divides n.
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