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If A, B are two sets, prove that AUB=(A-B) U (B-A) U (An B). Hence or otherwise prove that n(AUB) = n(A) + n(B)
If A, B are two sets, prove that AUB=(A-B) U (B-A) U (An B). Hence or otherwise prove that n(AUB) = n(A) + n(B) - n(AB) where, n(A) denotes the number of elements in A.
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A Survey of Mathematics with Applications
Authors: Allen R. Angel, Christine D. Abbott, Dennis Runde
10th edition
134112105, 134112342, 9780134112343, 9780134112268, 134112261, 978-0134112107
