For any set A, (A')' = ___
Solution
For any set A, (A')' = A
This is a principle in set theory. The complement of the complement of a set A is the set itself. This is because the complement of a set A (denoted as A') includes all elements not in A. Therefore, the complement of A' (denoted as (A')') includes all elements not in A', which are the elements in A.
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