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If \(f(x)=x^2-5x+6\) and \(g(x)=x-2\), for which value of \(x\) is \(\left(\frac{f}{g}\right)(x)=0\)?

Answer and explanation

Correct answer: \(x=3\)

The quotient \(\left(\frac{f}{g}\right)(x)\) is zero only when the numerator is zero and the denominator is non-zero. Here, \(f(x)=x^2-5x+6=(x-2)(x-3)\), so the numerator is zero at \(x=2\) and \(x=3\). However, \(g(2)=0\), so the quotient is undefined at \(x=2\). Therefore, the only valid zero is \(x=3\). Exam tip: For the zeros of a quotient function, first find the zeros of the numerator and then exclude any value that makes the denominator zero.

Related tags

Relations-FunctionsAlgebra-Of-FunctionsQuotient-FunctionDomain-And-RangeAlgebra Of Real FunctionsRelations And FunctionsMathematicsClass 11 Mcq

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