SOLUTION: What is the "U" symbols and sideways "E" looking symbol in pre algebra?

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Question 256854: What is the "U" symbols and sideways "E" looking symbol in pre algebra?
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
Do you mean backwards E?
Those are symbols for sets and unions etc.
http://en.wikipedia.org/wiki/Table_of_mathematical_symbols