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If (A={1,2,3}) and (B={4,5,6,7}), which definition gives a one-one function from (A) to (B)?

Answer and explanation

Correct answer: (f(1)=4, f(2)=5, f(3)=6)

Step 1: In a one-one function, different elements of (A) must have different images in (B). Step 2: In option (B), the images are (4,5,6), with no repetition. Step 3: For finite sets, absence of repeated images is the key check.

Related tags

Relations-FunctionsOne-One-FunctionFinite-SetMapping-ChoiceOne One FunctionRelations And FunctionsMathematicsClass 12 Mcq

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