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If (f:\mathbb{N}\to\mathbb{N}), (f(n)=2n-1), why is it not onto?

Answer and explanation

Correct answer: Because even natural numbers are not obtained

Step 1: (2n-1) always gives an odd natural number. Step 2: The codomain (\mathbb{N}) contains even numbers such as (2), which are not in the range. Step 3: For natural-number functions, separate even and odd outputs.

Related tags

Natural NumbersNot OntoOdd NumbersCodomainOnto FunctionRelations And FunctionsMathematicsClass 12 Mcq

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