alleryStart learning →If A = {1, 2, 3} and B = {3, 4}, find A ∪ B.
A{2, 3, 4}
B{1, 2, 3}
C{1, 2, 4}
D{1, 2, 3, 4}
Answer & Solution
Correct answer: D. {1, 2, 3, 4}
A union B contains every element in either set, with 3 listed only once.
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