using set algebra laws prove the following: 1) (A-B) U (B-A) = (A U B) - (A ∩ B) 2) ((A ∩ B)' U B)' = 0
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Start by replacing X - Y by X ∩ Y', then use De Morgan's laws and distributivity of ∩ over U.
Hello, beast! Here is the second one. I'll let you supply the reasons. . . . . . . . . . .
1st line - deMorgans? 2nd line - complement law? 3rd line - ??? 4th line - ??? please help
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