Question: Use a direct proof to prove the following: For all integers n, if n is odd then n is odd. For all integers m

Use a direct proof to prove the following: For all integers n, if n is odd then n is odd. For all integers m

Use a direct proof to prove the following: For all integers n, if n is odd then n is odd. For all integers m and n, if mn is even then m is even or n is even. (a) Prove by contraposition. (b) Prove by contradiction.

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