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Mathematics-Identity Laws
The Identity Law is one of the Laws of algebra for operations on sets. The following are the Laws of Identity.
U => Universal set
A => Any set
∅ => Null set
(1) A ∪ ∅ = A
(2) A ∩ ∅ = A
(3) A ∪ U = U
(4) A ∩ U = A
