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For a function \(f:A\to B\), which set contains \(f(x)\) for every \(x\in A\)?

Answer and explanation

Correct answer: \(B\)

In \(f:A\to B\), \(A\) is the domain and \(B\) is the codomain. Therefore, for every \(x\in A\), the function value \(f(x)\) belongs to \(B\). The set \(A\) contains the inputs, not necessarily the outputs, so option B is incorrect. Exam tip: in \(f:A\to B\), the set written after the arrow is the codomain of the function values.

Related tags

FunctionsCodomainDomainRelations And FunctionsFunctions As A Special Kind Of RelationMathematicsClass 11 Mcq

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