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In the identity function \(I_A:A\to A\), what is the image of any \(x\in A\)?

Answer and explanation

Correct answer: \(x\)

By definition, an identity function satisfies \(I_A(x)=x\). Thus, every element of the set \(A\) is mapped to itself. The image is not necessarily \(0\) or \(1\); it remains the input element \(x\). Exam tip: in an identity function, input and output are always the same.

Related tags

RelationsFunctionsIdentity-FunctionImage-Of-An-ElementFunctions As A Special Kind Of RelationRelations And FunctionsMathematicsClass 11 Mcq

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