The "Range of a function" can mean one of two things:

• The set from which values of the function are chosen, or
• The set of values actually achieved by a function.
The former is less ambiguously known as the co-domain, the latter is less ambiguously known as the image.

AGentleIntroductionToTimeComplexity
BirthdayProblem
Calculus
ChainRule
CoDomainOfAFunction
CommutativeOperation
CubeRoot
DifferentialCalculus
DomainOfAFunction
EquationOfALine
EulersNumber
Factorial
HolomorphicFunction
HyperbolicFunction
ImageOfAFunction
IntegralCalculus
IntegrationByParts
InverseFunction
LinearFunction
Logarithm
MathematicsTaxonomy
NewtonsMethod
OrdinaryDifferentialEquation
PartialDifferentialEquation
RiemannHypothesis
RiemannSurface
RiemannZetaFunction
SquareRoot
TrigonometricFunction
(none) (none)
Function (none)

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RangeOfAFunction
CoDomainOfAFunction
ImageOfAFunction
Polynomial
RealNumber
DomainOfAFunction (none)