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Let m be a composite positive integer and suppose that m = 4k + 3 for...

Let m be a composite positive integer and suppose that m = 4k + 3 for some integer k. If m = ab for some integers a and b, then a = 4l + 3 for some integer l or b = 4l + 3 for some integer l.

1. Write the set up for a proof by contradiction.
2. Write out a careful proof of the assertion by the method of contradiction.
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