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If \(f=\{(1,b),(2,c),(3,b)\}\), which element has \(c\) as its image?

Answer and explanation

Correct answer: 2

In an ordered pair \((x,f(x))\), the first component is the input and the second component is its image. Since \((2,c)\) is given, the preimage of \(c\) is \(2\). The elements \(1\) and \(3\) have image \(b\), while \(b\) is not an input element in this relation. Exam tip: To find the preimage of a given image, match it with the second component and read the first component of that ordered pair.

Related tags

FunctionsRelationsOrdered-PairsImagePreimageFunctions As A Special Kind Of RelationRelations And FunctionsMathematics

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