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What is the range of the function \(y=\frac{1}{|x|}\)?

Answer and explanation

Correct answer: \((0,\infty)\)

For this function, \(x\neq 0\), so \(|x|>0\) and therefore \(y=\frac{1}{|x|}>0\). As \(|x|\) becomes very large, \(y\) approaches zero but never equals it; as \(|x|\) approaches zero, \(y\) can increase without bound. Hence the range is \((0,\infty)\). Option B is incorrect because it includes \(0\). Exam tip: the reciprocal of a positive number is always positive, so negative values cannot belong to the range.

Related tags

GraphsStandard FunctionsRangeRational FunctionsAbsolute ValueReal Valued FunctionsTheir Domain And RangeReal Valued Functions Their Domain And RangeRelations And Functions

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