A and B are two sets (A – B) È (B – A) È (A Ç B) = ..........
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What can you say about the sets A and B if A ⊕ B = A? Sol: The set B is the empty set ∅. If there were any elements in B that were also in A, then these elements would not be in the symmetric difference and the symmetric difference could not contain all of A.
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