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What is the value of \(f(x)=\lfloor x-3\rfloor\) at \(x=5.9\)?

Answer and explanation

Correct answer: 2

Substituting \(x=5.9\) gives \(x-3=5.9-3=2.9\). The greatest-integer function \(\lfloor y\rfloor\) gives the greatest integer less than or equal to \(y\), so \(\lfloor 2.9\rfloor=2\). The value 2.9 is only the intermediate expression, not the final function value. Exam tip: for a decimal input, take the greatest integer that is less than or equal to it.

Related tags

Relations And FunctionsGreatest Integer FunctionStandard FunctionsFunction EvaluationGraphs Of Standard FunctionsMathematicsClass 11 Mcq

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