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What is the domain of the function f(x) = √(x − 2) + √(7 − x)?

Answer and explanation

Correct answer: [2, 7]

For both square roots to be real, x − 2 ≥ 0 and 7 − x ≥ 0. Together these give 2 ≤ x ≤ 7, so the domain is [2, 7]. Both endpoints are valid because one radicand is zero at each endpoint.

Related tags

DomainRadical-FunctionsIntervalsReal Valued FunctionsTheir Domain And RangeReal Valued Functions Their Domain And RangeRelations And FunctionsMathematicsClass 11 Mcq

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