Question

If A = {1, 2, 3, 4}, B = {3, 4, 5, 6}, C = {5, 6, 7, 8} and D = {7, 8, 9, 10}; find
(i) $A∪ B$
(ii) $A ∪ C$
(iii) $B ∪ C$
**(iv) **$B ∪ D$
(v) $A ∪ B ∪ C$
(vi) $A∪ B ∪ D$
(vii) $B ∪ C ∪ D$

Answer 1

A = {1, 2, 3, 4], B = {3, 4, 5, 6}, C = {5, 6, 7, 8} and D = {7, 8, 9, 10}

(i) $A ∪ B$ = {1, 2, 3, 4, 5, 6}

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(ii) $A ∪ C$ = {1, 2, 3, 4, 5, 6, 7, 8}

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(iii) $B ∪ C$= {3, 4, 5, 6, 7, 8}

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(iv) $B∪ D$= {3, 4, 5, 6, 7, 8, 9, 10}

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**(v) **$A ∪ B ∪ C$ = {1, 2, 3, 4, 5, 6, 7, 8}

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(vi) A ∪ B ∪ D = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10}

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(vii) B ∪ C ∪ D = {3, 4, 5, 6, 7, 8, 9, 10}