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Math Help - More Proofs

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    More Proofs

    Prove for all N in Z, if N is odd if and only if N+2 is odd
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  2. #2
    Super Member Matt Westwood's Avatar
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    Quote Originally Posted by sderosa518 View Post
    Prove for all N in Z, if N is odd if and only if N+2 is odd
    The "if" part:

    express N in the form 2k+1 and show that this makes N+2 in the same form.

    The "only if" part:

    express N+2 in the form 2k+1 and show that this makes N in the same form.
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