Interval Notation

Front

What is interval notation?

Back

A mathematical notation used to represent a range of values, typically expressed using parentheses and brackets.

Front

What do the symbols ( and ) represent in interval notation?

Back

They indicate that the endpoints are not included in the interval (open interval).

Front

What do the symbols [ and ] represent in interval notation?

Back

They indicate that the endpoints are included in the interval (closed interval).

Front

Can you use the symbols [ or ] with infinity?

Back

No, you cannot use [ or ] with infinity.

Front

How is the interval notation for all real numbers expressed?

Back

(-∞, ∞)

Front

What is the interval notation for the set of numbers greater than or equal to 3?

Back

[3, ∞)

Front

What is the interval notation for the set of numbers less than 5?

Back

(-∞, 5)

Front

What does the union symbol (U) represent in interval notation?

Back

It represents the combination of two or more intervals.

Front

What is the interval notation for the graph of x < -2 or x > 3?

Back

(-∞, -2) U (3, ∞)

Front

When graphing an inequality, what does a closed dot indicate?

Back

It indicates that the endpoint is included in the solution.