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If \(f(x)=x^2+2x+2\) and \(g(x)=x^2-2x+2\), what is the value of \((fg)(0)\)?

Answer and explanation

Correct answer: 4

For the product function, \((fg)(x)=f(x)g(x)\). Here, \(f(0)=0^2+2(0)+2=2\) and \(g(0)=0^2-2(0)+2=2\). Therefore, \((fg)(0)=f(0)g(0)=2\times2=4\). The value 2 is the value of each individual function, not their product. Exam tip: For \((fg)(a)\), evaluate both functions at \(a\) and then multiply the results.

Related tags

Relations-FunctionsAlgebra-Real-FunctionsProduct-FunctionsFunction-EvaluationAlgebra Of Real FunctionsRelations And FunctionsMathematicsClass 11 Mcq

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