College Algebra / Unit 5 Alg 250 short lesson, about 20 seconds
The Range
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The idea
The range of a function is the set of all outputs the domain actually produces.
In practice
f(x) = x² takes in every real number but only puts out 0 and up: range [0, ∞). Squares are never negative.
Where people slip
The range is earned by the domain, never assumed.
Your place on the trail
Every lesson rests on earlier ones and opens later ones. Tap any to jump.
Builds on
- Nothing. This is a starting point.
Unlocks
- Nothing yet depends on this.
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