A = {1, 2, 3} B = ∅ হলে A ∪ B = কত?

1. A = {1, 2, 3} B = ∅ হলে A ∪ B = কত?

[34 th BCS Preliminary : 2013]

1. {1, 2, 3}

2. {1, 2, ∅}

3. {2, 3, ∅}

4. {∅}

Answer

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