Question

Difference between open and closed interval of function

Answer 1

An open interval includes the range of numbers in that interval EXCEPT for the end point. A closed interval includes the range of numbers in the interval, INCLUDING the end point. When written as sets of numbers, a parentheses is used to denote an open interval on that end point, and a bracket is used for a closed interval. For example, the solution set to √x <= 10 is [0,100]