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OpenStudy (anonymous):
If A = {1, 2, 3, 4, 5} and B = {3, 6, 9, 12, 15}, what is A union B?
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OpenStudy (anonymous):
A union B is all the elements of A as well as all the elements of B i.e. [1,2,3,4,5,6,9,12,15] in this case
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