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If \(f(x)=x-2\) and \(g(x)=x+2\), what is the sum of the functions, \((f+g)(x)\)?

Answer and explanation

Correct answer: \(2x\)

By the definition of the sum of two functions, \((f+g)(x)=f(x)+g(x)\). Therefore, \((f+g)(x)=(x-2)+(x+2)=2x\), because the constant terms \(-2\) and \(+2\) cancel each other. Option B corresponds to the product \(f(x)g(x)\), while option C considers only the constant terms. Exam tip: In \(f+g\), add the function values; do not multiply them.

Related tags

AlgebraReal FunctionsFunction AdditionLinear FunctionsAlgebra Of Real FunctionsRelations And FunctionsMathematicsClass 11 Mcq

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