Complement

Parin Sir > Complement
31
May
Complement of  a Set

☼ Complement of  a Set  :   Let  A  be a subset of  the universal set  U, then the complement of  A, denoted by  Aٰ  or  A is defined by :

Aٰ  =  A =  { x : x  U,  x  A }.

Clearly, x  A    x  A.

 e.g.

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