Discrete math? - Freemason Hirams Travels Masonic Forums

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02-26-2008, 05:27 PM

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Discrete math?

Let x E Z.
(a) Prove that if x is even, then x^2 congruence to 0 or 4 (mod 8).
(b) Prove that if x is odd, then x^2 congruence to 1 (mod 8).

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