The closed interval `[a,b]` is the set of all real numbers `x` such that `alt= xlt= b` . This is written as,
`[a,b]={x in R| alt= xlt= b}`
This is usually written this simply as `{x | alt= xlt= b}` , and it is understood that `x` belongs to `R` .
See eNotes Ad-Free
Start your 48-hour free trial to get access to more than 30,000 additional guides and more than 350,000 Homework Help questions answered by our experts.
Already a member? Log in here.
Further Reading