Disjoint Sets - X ∩ Y = ∅, then the two sets are......, Equal Sets - X ∪ Y = X ∩ Y, then the two sets are....., Union of two sets - {a:a ∈ X or a ∈ Y}, Intersection of two sets - {a:a ∈ X and a ∈ Y}, Difference between two sets - {a:a ∈ X and a ∉ Y}, Empty sets - X ∪ Y = ∅, then the two sets are........,

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