Question: If a is even, prove that a- is even. If a is odd, prove that ais odd. If a is even, prove that a-

If a is even, prove that a- is even. If a is

If a is even, prove that a- is even. If a is odd, prove that ais odd. If a is even, prove that a- is even. If a is odd, prove that ais odd.

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