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On (A={1,2,3,4}), (f:A\to A) is defined by (f(1)=2), (f(2)=4), (f(3)=1), (f(4)=3). Which statement is correct?

Answer and explanation

Correct answer: It is one-one

Step 1: The images of the four domain elements are (2,4,1,3). Step 2: All of them are distinct, so no two different inputs have the same image. Step 3: For finite sets, list the images to check one-one nature quickly.

Related tags

Finite FunctionOne-OneTable MethodPermutationOne One FunctionRelations And FunctionsMathematicsClass 12 Mcq

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