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Question
If A and B are two sets such that A ⊂ B, then what is A ∪ B?
Solution
If A and B are two sets such that A ⊂ B, then A ∪ B = B.
Take A= {1, 2) and B = {1, 2, 3).
∴ A ∪ B = {1, 2, 3) = B.
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