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If \(f(x)=x+1\), \(g(x)=x+2\), and \(h(x)=x+3\), what is the value of \((f+g+h)(x)\)?

Answer and explanation

Correct answer: \(3x+6\)

The sum of functions is defined pointwise: \((f+g+h)(x)=f(x)+g(x)+h(x)\). Therefore, \((x+1)+(x+2)+(x+3)=3x+6\). Option B is incorrect because it counts the term \(x\) only once. Exam tip: for a sum of functions, add their values at the same input.

Related tags

Relations And FunctionsAlgebra Of Real FunctionsFunction AdditionPointwise OperationsMathematicsClass 11 Mcq

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