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If f(x) = 3x − 1, what is the value of f(2) + f(0)?

Answer and explanation

Correct answer: 4

The governing concept is evaluation of a function at specified inputs. Substitute x = 2 into f(x) = 3x − 1: f(2) = 3(2) − 1 = 6 − 1 = 5. Next substitute x = 0: f(0) = 3(0) − 1 = −1. Add the two function values: f(2) + f(0) = 5 + (−1) = 4. Hence option A is correct. Option B gives only f(2) and ignores f(0); option C can result from forgetting the subtraction of 1, and option D does not follow from either substitution. The crucial point is that each input must be placed into the entire rule before the results are added.

Related tags

Function EvaluationLinear FunctionSubstitutionFunctionsRelations And FunctionsMathematicsClass 12 Mcq

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