Asked by Wayne

What is the Answer to this problem;

A U A'
Answered by Reiny
A U A' = <b>U</b> , the universal set

eg. suppose A is the set of all German books in the set of all books
Then A' is the set of all non-German books

so AUA' would the all German books OR all non-German books, which would be the set of all books
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