College Algebra / Alg 156 · Atom · ~20 seconds
Interval Notation
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Interval notation writes a stretch of real numbers by its endpoints — brackets include an endpoint, parentheses exclude it, and infinity takes a parenthesis.
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[2, 5) holds every number from 2 up to but not including 5; (−∞, 3] holds everything through 3.
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Interval notation is this course's default answer form for solution sets.
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