find the number of elements in the power set of the set a ={2,{1,4}}
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In mathematics, the power set (or powerset) of any set S is the set of all subsets of S, including the empty set and S itself, variously denoted as P(S), (S), ℘(S) (using the "Weierstrass p"), P(S), ℙ(S), or, identifying the powerset of S with the set of all functions from S to a given set of two elements, 2S.
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4
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( ),(2),(1,4),(2,(1,4))
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