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What is the domain of f(x)=√(x+3)/√(2−x)?

Answer and explanation

Correct answer: [-3,2)

The numerator and denominator impose different square-root conditions. For the numerator, x+3≥0, so x≥−3; equality is permitted because a zero numerator is valid. For the denominator, √(2−x) must be real and cannot be zero. Therefore the stronger condition is 2−x>0, giving x<2. Intersecting x≥−3 with x<2 yields −3≤x<2, or [-3,2). Hence option A is correct. The endpoint −3 is included because the numerator becomes zero while the denominator remains √5, which is nonzero. The endpoint 2 is excluded because the denominator becomes zero. Option B wrongly includes 2, option C wrongly excludes −3, and option D includes values below −3 where the numerator is not real.

Related tags

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

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