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Let f and g be polynomial functions and \(h(x)=\frac{f(x)}{g(x)}\). If \(g(a)=0\), which statement about h at \(x=a\) is necessarily true?

Answer and explanation

Correct answer: h is undefined at \(x=a\)

A quotient function cannot be defined where its denominator is zero. Thus \(g(a)=0\) makes \(h(a)\) undefined, even if \(f(a)=0\). Exam tip: find denominator zeros first and exclude them from the domain.

Related tags

FunctionsQuotient FunctionDomainPolynomial FunctionsUndefined ValuesReal Valued FunctionsTheir Domain And RangeReal Valued Functions Their Domain And RangeRelations And Functions

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