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If (A) is a finite set and (f:A\to A) is one-one, which conclusion is true?

Answer and explanation

Correct answer: (f) is also onto

Step 1: For a finite set, a one-one function from (A) to (A) gives distinct images. Step 2: Since the domain and codomain have the same number of elements, all codomain elements are used. Step 3: On finite equal sets, one-one implies onto.

Related tags

FunctionsFinite-SetOne-OneOntoRelations And FunctionsMathematicsClass 12 Mcq

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