Math Domain Interval Notation

When using interval notation domain and range are written as intervals of values.

Math domain interval notation. Interval notation is a notation used to denote all of the numbers between a given set of numbers an interval. For example 3 x 2 3 2 and x ℝ 3 x 2 all mean that x is between 3 and 2 and could be either endpoint. Open parentheses closed parentheses infinity imagine an 8 sideways negative infinity an 8 sideways with a negative sign in front of it and union a symbol similar to an elongated u.

D indicates that you are talking about the domain and read as negative infinity to positive infinity is another way of saying that the domain is all real numbers the range of f x x 2 in interval notation is. Introducing intervals which are bounded sets of numbers and are very useful when describing domain and range. In interval notation there are five basic symbols to be familiar with.

Then the open interval a b represents the set of all real numbers between a and b except a and b. For f x x 2 the domain in interval notation is. X a x b is the set builder notation.

Suppose that a and b are real numbers such that a b. We use interval notation to represent subsets of real numbers. We can use interval notation to show that a value falls between two endpoints.

A x b is the inequality description. A b is the interval notation. 0 r indicates that you are talking about the range.