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Unsure about what a boolean logic symbol means

Hi,

In boolean algebra, specifically dealing with simplifying expressions, what does
' represent?

example: (A+B)'(C+D+E)'+(A+B)'

I can't find anything reliable.

Thank you.

*EDIT*
I'm sorry. I literally just found it. It means "not" right?
Last edited on
That's wrong' !

Andy :-)
Last edited on
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