If A and B are two sets such that A ⊂ B, then what is A ∪ B

Tuesday, 8 April 2014
If A and B are two sets such that A ⊂ B, then what is A ∪ B?
Answer
Given that, A is a subset of B which implies all element of set A is belongs to set B.
So that A ∪ B = B.

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