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

Answer and explanation

Correct answer: Image of x

For the function \(f:A\to B\), the value obtained for \(x\in A\), namely \(f(x)\), is called the image of \(x\), and it belongs to the codomain \(B\). The domain \(A\) is the set of inputs, whereas the codomain \(B\) is the set of possible outputs. Exam tip: distinguish the image of an input from its preimage.

Related tags

FunctionsImageDomainCodomainRelationsFunctions As A Special Kind Of RelationRelations And FunctionsMathematics

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