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If f: {0,1,2,3,4,5} → {0,1,2,3,4,5} is defined such that f(x) is the remainder when 4x is divided by 6, what is the range of f?

Answer and explanation

Correct answer: {0,2,4}

For x = 0,1,2,3,4,5, the remainders obtained on dividing 4x by 6 are 0, 4, 2, 0, 4, 2, respectively. Thus, the distinct output values are {0,2,4}, which is the range of f. Option B is the codomain, not the set of values actually attained by the function. Exam tip: To find the range of a finite function, evaluate every domain element and list the distinct outputs.

Related tags

Modulo FunctionRangeCodomainReal Valued FunctionsTheir Domain And RangeReal Valued Functions Their Domain And RangeRelations And FunctionsMathematicsClass 11 Mcq

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