- #1

dranseth

- 87

- 0

## Homework Statement

I don't really know how to ask this, so I'll get straight into an example.

x:x[tex]\in[/tex](-[tex]\infty[/tex],[tex]\infty[/tex]) but x[tex]\neq[/tex]1

x:x[tex]\in[/tex](-[tex]\infty[/tex],1)[tex]\cup[/tex](1,[tex]\infty[/tex])

what is the difference between these two intervals?