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  3. let x, y ⊂ z and x, y ∈ z let a = (x\{x

Let X, Y ⊂ Z and x, y ∈ Z Let A = (X\{x}) ∪...

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Advance Math

Let X, Y ⊂ Z and x, y ∈ Z Let A = (X\{x}) ∪ {x}.

a) Prove or disprove: A ⊆ X

b) Prove or disprove: X ⊆ A

c) Prove or disprove: P(X ∪ Y ) ⊆ P(X) ∪ P(Y ) ∪ P(X ∩ Y )

d) Prove or disprove: P(X) ∪ P(Y ) ∪ P(X ∩ Y ) ⊆ P(X ∪ Y )

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