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Intervals and interval notation

Introducing intervals, which are bounded sets of numbers and are very useful when describing domain and range.

We can use interval notation to show that a value falls between two endpoints. 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. 

Video transcript