Unformatted text preview: your answer. Problem 3 . Suppose that p , q and r are prime numbers and that p is odd. If p  2 q + r and p  2 qr , prove that q = r . Problem 4 . Show that for all positive integers a and b we have a ± ± b if and only if a 2 ± ± b 2 . 1...
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 Spring '08
 ANDREWCHILDS
 Integers, Natural number, Prime number

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