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1. |
If ξ is the universal set and P is a subset of ξ, then what is P ∩ { (P– ξ) ∪ (ξ– P)} equal to(a) ϕ (b) P′ (c) ξ (d) P |
Answer» (a) ϕ Given set = P ∩ {( P – ξ) ∪ ( ξ – P)} = P ∩ {ϕ ∪ P′} = P ∩ P′ = ϕ |
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