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If (f:\mathbb{R}\setminus{-3}\to\mathbb{R}) and (f(x)=\frac{1}{x+3}), why is it a function?

Answer and explanation

Correct answer: Because (x=-3) is removed from the domain

Now (\frac{1}{x+3}) is defined for every domain element and gives one value. In exams, changing the domain can make a rule valid.

Related tags

Relations-FunctionsRestricted-DomainFunction-ValidityFunctions As A Special Kind Of RelationRelations And FunctionsMathematicsClass 11 Mcq

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