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What is the domain of f(x) = log₃(x − 1) + log₃(5 − x)?

Answer and explanation

Correct answer: (1, 5)

Each logarithm's argument must be positive. The conditions are x − 1 > 0, so x > 1, and 5 − x > 0, so x < 5. Their intersection is (1, 5); the endpoints are excluded because an argument would be zero.

Related tags

DomainLogarithmsReal Valued FunctionsTheir Domain And RangeReal Valued Functions Their Domain And RangeRelations And FunctionsMathematicsClass 11 Mcq

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