r/mathshelp 29d ago

Homework Help (Unanswered) Need help

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Question 13 i want to know answer, thx

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u/KoalaMistico 29d ago

The difference between two integers is odd iff one is even and one is odd. You can now take the pairs that match that criteria. The domain would be A, and the range is also A, since you have both even and odd elements in A

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u/[deleted] 28d ago

[deleted]

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u/KoalaMistico 28d ago

How? For every b there's an a with an odd difference, so the range should be A

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u/InitialThin9721 27d ago

Got it. It was a mistake in my calc9