NCERT Class XI Mathematics - Sets - Solutions

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Question : 33
Total: 73
If A and B are two sets such that A ⊂ B, then what is A ∪ B ?
Solution:  
Here A and B are two sets such that A ⊂ B.
Take A = {1, 2} and B = {1, 2, 3}.
∴ A ∪ B = {1, 2, 3} = B.
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