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What is the range of the function \(f(x)=|x-2|\)?

Answer and explanation

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

For every real \(x\), \(|x-2|\) can never be negative, so \(f(x)\ge 0\). At \(x=2\), \(f(2)=0\), and every non-negative value is obtained by taking \(x\) suitably far from 2. Therefore, the range is \([0,\infty)\). The option \([2,\infty)\) incorrectly treats the horizontal shift in the input as a shift in the range. Exam tip: \(|x-a|\) has minimum value 0 when \(x=a\) lies in the domain.

Related tags

Range Of FunctionModulus FunctionAbsolute ValueReal Valued FunctionsClass 11 MathematicsTheir Domain And RangeReal Valued Functions Their Domain And RangeRelations And Functions

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