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If \(f:\{0,1,2,3\}\to\{0,1,2,3\}\) is defined such that \(f(x)\) is the remainder obtained when \(x\) is divided by 3, which of the following statements is correct?

Answer and explanation

Correct answer: The range is \(\{0,1,2\}\)

Dividing \(0,1,2,3\) by 3 gives the remainders \(0,1,2,0\), respectively. Hence the set of actual values of the function, or its range, is \(\{0,1,2\}\). The equality \(f(0)=f(3)=0\) does not violate the definition of a function; different inputs may have the same output, provided each input has exactly one output. Exam tip: To find the range, list the actual outputs rather than simply copying the codomain.

Related tags

FunctionsRelationsRangeModulo ArithmeticReal Valued FunctionsTheir Domain And RangeReal Valued Functions Their Domain And RangeRelations And FunctionsMathematics

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