1.

If P and Q any two sets, then Q – P = (a) Q ∪ P′ (b) Q ∩ P′ (c) Q′ ∩ P′ (d) Q′ ∩ P′

Answer»

For all x ∈ Q – P ⇒ x ∈ Q and x ∈ P 

⇒ x ∈ Q and x ∈ P′ 

⇒ x ∈ Q ∩ P′ 

∴ Q – P = Q ∩ P′



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