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Prove: For all integers n, if n2 is odd, then n is odd. Use a proof by contraposition, as in Lemma 1.1.

Guide :High School

Prove: For all integers n, if n2 is odd, then n is odd. Use a proof by contraposition, as in Lemma 1.1.

Prove: For all integers n, if n2 is odd, then n is odd. Use a proof by contraposition, as in Lemma 1.1.
The contrapositive of above is "If n is not odd then n^2 is not odd" or "If n is even then n^2 is even".So, let assume that n is eventhen which is even q.e.d. ...

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