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If \(f:A\to B\) is a function, what is \(A\) called?

Answer and explanation

Correct answer: Domain

In the function \(f:A\to B\), \(A\) is the set of all input elements on which the function is defined, so it is called the domain. \(B\) is the codomain, while the set of actual output values is the range, which may be a subset of the codomain. In an exam, identify the first set in \(f:A\to B\) as the domain and the second as the codomain.

Related tags

FunctionsDomainCodomainRangeRelationsReal Valued FunctionsTheir Domain And RangeReal Valued Functions Their Domain And RangeRelations And Functions

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