College Algebra / Unit 7 Alg 386 short lesson, about 20 seconds
Radical Functions and Their Domains
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The idea
A radical function carries the variable under a radical; with an even index, the domain is wherever the radicand is nonnegative.
In practice
g(x) = √(x − 2) lives on [2, ∞): the radicand crosses into legality at 2, bracket included since √0 = 0.
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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