Problems 1. (20 points) Prove that 7" - 4" is divisible by 3 for all n > 1.
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Problems 1. (20 points) Prove that 7" - 4" is divisible by 3 for all n > 1.
Problems 1. (20 points) Prove that 7" - 4" is divisible by 3 for all n > 1.
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