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If (A={1,2,3}), (B={a,b,c}), and (f={(1,a),(2,a),(3,b)}), what is true about (f)?

Answer and explanation

Correct answer: It is neither one-one nor onto

Step 1: Both (1) and (2) map to (a), so the function is not one-one. Step 2: (c) is in the codomain but is not an image, so it is not onto. Step 3: Every input has one image, so it is a function, but neither one-one nor onto.

Related tags

Finite FunctionNot One OneNot OntoMappingFunctionsRelations And FunctionsMathematicsClass 12 Mcq

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