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If f(x) = x/(x+1) and g(x) = 1/x, what are the simplified form and domain of (f/g)(x)?

Answer and explanation

Correct answer: x²/(x+1), x ≠ 0, −1

The quotient of two functions is defined by (f/g)(x) = f(x)/g(x), so we must divide x/(x+1) by 1/x. Dividing by a fraction means multiplying by its reciprocal: [x/(x+1)] × x = x²/(x+1). The domain must preserve every restriction from the original functions and must also ensure that the divisor g(x) is not zero. Here f(x) requires x ≠ −1, while g(x) = 1/x requires x ≠ 0; also g(x) never equals zero for any allowed real x. Therefore the domain is all real numbers except 0 and −1. Option A is correct. Option B incorrectly cancels a factor, option C reverses the operation, and option D uses the reciprocal of the final result.

Related tags

Relations-FunctionsAlgebra-Real-FunctionsQuotient-FunctionsDomainAlgebra Of Real FunctionsRelations And FunctionsMathematicsClass 11 Mcq

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