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If A is a non-empty set and \(f(x)=10\) for every x \(\in A\), what is the range of \(f\)?

Answer and explanation

Correct answer: \(\{10\}\)

Every element x \(\in A\) is mapped to 10, so the set of all output values is only \(\{10\}\). This is a constant function, and repeated output values are listed only once in the range. Exam tip: for a constant function \(f(x)=c\), the range is \(\{c\}\), provided the domain is non-empty.

Related tags

Relations And FunctionsConstant FunctionRangeDomain And CodomainReal Valued FunctionsTheir Domain And RangeReal Valued Functions Their Domain And RangeMathematicsClass 11 Mcq

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