Question

If A = {1,3,9, 11, 13), B = {1,9, 11) then find A UB and AB
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Answer 1

Answer:

AUB = { 1,3,9,11,13}

A(intersection)B = {1,9,11}

Answer 2

Answer:

A U B

={1,3,9,11,13} U {1,9,11}

={1,3,9,11,13}