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Interval Notation

This video presents the same text shown beside it, spoken and on screen. It adds nothing the text does not say.

State

Interval notation writes a stretch of real numbers by its endpoints — brackets include an endpoint, parentheses exclude it, and infinity takes a parenthesis.

Show

[2, 5) holds every number from 2 up to but not including 5; (−∞, 3] holds everything through 3.

Watch for

Interval notation is this course's default answer form for solution sets.

Builds on

  • Nothing — this is a starting point.

Unlocks

  • Nothing yet depends on this.