Please help with the following:

What is an open dot, and what is a closed dot?

Also, when are they used in inequalities?

I am not really sure about what they are. The lesson has not taught me anything about open dots and closed dots. I have also looked them up, but I got confused. Please help, and it will be greatly appreciated. :)

3 answers

a closed dot means included

like x < 5 means less than (open)

x </= 5 means less than or equal to (closed)

http://mathcentral.uregina.ca/QQ/database/QQ.09.05/cynthia1.html
Oh, now I get it!

Less than(<) and greater than(>) are open, while less than or equal to(≤) and greater than or equal to(≥) are closed.

Thank you, Damon! Your help is again, greatly appreciated. :)
You are welcome :)
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