If A = {1, 3, 4, 8} and B = {3, 6, 8, 9, 12}, find:
i. A – B
ii. B – A
iii. A ∪ B and A ∩ B
[3 marks]

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Solution

A - B = {1, 4}
(1 mark)

B – A = {6, 9, 12}
(1 mark)

A ∪ B = {1, 3, 4, 6, 8, 9, 12} and A ∩ B = {3, 8}
(1 mark)

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If A = {1, 3, 4, 8} and B = {3, 6, 8, 9, 12}, find:
i. A – B
ii. B – A
iii. A ∪ B and A ∩ B

A = {1, 2, 3, 4, 5}, B = {4, 5, 6, 7, 8}, C = {7, 8, 9, 10, 11} a n d D = {10, 11, 12, 13, 14} .

A \cup C

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