Question

(1)
If U = {1, 2, 3, 4, 5, 6, 7), A = {3,4} and B = {4, 5, 6} then verify that
(AUB)' = A' B​

Answer 1

AUB= [3, 4,5,6]

(AUB) '=[1, 2,7]

A'=[1, 2,5,6,7]

B=[4, 5,6]

so, A'-B=[1, 2,7]

please check it must be A'-B

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