This is your very first post. Click the Edit link to modify or delete it, or start a new post. If you like, use this post to tell readers why you started this blog.
Describe the following sets of real numbers geometrically:
Solution: Let be as defined above.
- The set describes the ray extending from to , but not including .
- Note that or . So represents both a closed ray at extending to and a closed ray at extending to .
- The set describes the two points on the real line, because or .