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Use the method of direct proof to prove the following statement: For integers a and b,...

Use the method of direct proof to prove the following statement: For integers a and b, if a is odd or b is odd, then (a + 7)(b 5) is even.

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odd integers b=25+1 Direct proof: - bu Since, a and b are arbitrary Then, a and it can be written in ferm a=2kti where, Kand

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