Set Theory Question.

zacblack

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Oct 29, 2013
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Prove A is a subset of B if and only if A and B' equals the empty set. Just not sure what to do here. Any help is appreciated.
 
Prove A is a subset of B if and only if A and B' equals the empty set. Just not sure what to do here. Any help is appreciated.

You most show that \(\displaystyle A\cap B'=\emptyset~.\)

To get you started, if \(\displaystyle x\in A\) can it be that \(\displaystyle x\notin B~?\)
 
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