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If A={1,2} and B={x,y,z}, which subset of A×B is a function?

Answer and explanation

Correct answer: {(1,x),(2,z)}

In the first option, both 1 and 2 have exactly one image. In the other options, an input is missing or mapped twice.

Related tags

FunctionsCartesian-ProductSubsetFunctions As A Special Kind Of RelationRelations And FunctionsMathematicsClass 11 Mcq

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