Question: Let A and B be any sets. Prove: (a) A is the disjoint union of AB and A intersection of B. (b) A U B

Let A and B be any sets. Prove:

(a) A is the disjoint union of A\B and A intersection of B.

(b) A U B is the disjoint union of A\B, A intersection of B, and B\A.

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