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If \(f(x)=x+2\) and its domain is \(\{1,2,3\}\), what is the value of \(f(2)\)?

Answer and explanation

Correct answer: 4

Since \(2\) belongs to the given domain \(\{1,2,3\}\), substitute \(x=2\) in the rule: \(f(2)=2+2=4\). Option B incorrectly omits the added constant 2. Exam tip: to find a function value, replace \(x\) directly with the given input.

Related tags

FunctionsFunction ValueDomainEvaluationReal Valued FunctionsTheir Domain And RangeReal Valued Functions Their Domain And RangeRelations And FunctionsMathematics

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