The Domain of a Function
This video presents the same text shown beside it, spoken and on screen. It adds nothing the text does not say.
State
The domain of a function is the set of all allowed inputs; by convention it is the largest set of real numbers on which the rule is defined.
Show
f(x) = 1/(x − 3) accepts every real number except 3, where the denominator dies: domain (−∞, 3) ∪ (3, ∞).
Builds on
- Nothing — this is a starting point.
Unlocks
- Nothing yet depends on this.