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Question
If A and B are subsets of the universal set U, then show that (A ∩ B) ⊂ A
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Solution
A and B are subsets
To prove: (A ∩ B) ⊂ A
Proof: Let x ∈ A ∩ B
⇒ x ∈ A and x ∈ B
⇒ x ∈ A
⇒ A ∩ B ⊂ A
Hence Proved.
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