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What Are Intervals?

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Definition
Interval on a Number Line
Activity Set 1
Intervals as Inequalities
Activity Set 1
Interval Notation Using Square Brackets and Parentheses
Activity Set 1
Open Intervals

What Is an Open Interval?

An open interval is an interval that does not include its endpoints. Both finite and infinite intervals can be open. Check out this video for some examples.

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    Activity Set 1
    Closed Intervals
    Activity Set 1
    Half-open Intervals
    Activity Set 1
    Union of Intervals
    Activity Set 1
    Intersection of Intervals
    Activity Set 1
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