Asked by David

Prove or provide a counterexample:

For all sets A, B, C, if A is subset of B and B is a subset of C^c (complement of C), then A intersection C= { }.

Answered by oobleck
done
Answered by David
I tried using a proof by contradiction, but I am not sure if that is actually the correct method to do it.
Answered by oobleck
did you see the solution I offered to your first post?
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