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For the function \(f(x)=\{x-2\}\), what is the value of \(f(5.75)\)? Here, \(\{y\}\) denotes the fractional part of \(y\).

Answer and explanation

Correct answer: 0.75

Substituting \(x=5.75\) gives \(x-2=5.75-2=3.75\). The fractional part of \(3.75\) is \(0.75\), so \(f(5.75)=0.75\). Option B, \(3.75\), is only the intermediate value before taking its fractional part. Exam tip: subtract the integer part from a number to obtain its fractional part.

Related tags

Standard-FunctionsFractional-Part-FunctionFunction-EvaluationReal Valued FunctionsTheir Domain And RangeReal Valued Functions Their Domain And RangeRelations And FunctionsMathematicsClass 11 Mcq

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