homework4 - n is an integer. Prove that n 2 + 2 is not...

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MA 315, Spring 2011 Homework 4 Due Tuesday, February 16, 2011 Your paper must be typed and you must write in complete sentences with correct spelling, punctuation and grammar. (1) Assume
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Unformatted text preview: n is an integer. Prove that n 2 + 2 is not divisible by 5. (2) Assume n is an integer. Then n is even, n is divisible by 3, or n 2-1 is divisible by 12. 1...
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