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If \(f:\{1,2,3\}\to\{2,5,10\}\) is defined by \(f(x)=x^2+1\), what is the value of \(f(3)\)?

Answer and explanation

Correct answer: 10

Substituting \(x=3\) into the given rule gives \(f(3)=3^2+1=9+1=10\). Hence, the correct answer is 10. Option 9 results from calculating only \(3^2\) and forgetting to add 1. Exam tip: substitute the input into the complete function rule before simplifying.

Related tags

Relations And FunctionsFunction ValueQuadratic FunctionSubstitutionFunctions As A Special Kind Of RelationMathematicsClass 11 Mcq

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