Question

Question #48bc3

Answer 1

In domain and range (using interval notation), ordinary parentheses are used to indicate lower or upper bounds of an interval, not including the number itself. For example, if a function has a domain of `(-1, 1)`, then the domain includes all number between -1 and 1, but not the two numbers themselves.

Brackets are used to indicate when an interval includes the endpoint. For instance, the range `[-1, 1]` would include all the numbers between -1 and 1, as well as -1 and 1.

Braces are not used in interval notation, but they can be used to represent domain and range, in addition to any set of numbers. An example of how they are used is `{x|x!=1}`. This set includes all values of x, such that x is not equal to 1. Set notation can be used for domain and range, and more.