Find the domain of the composite function fog (x) if f(x)= 2x+1; g(x)= x +4

Expert Answers

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The function f(x)= 2x+1 and g(x)= x +4

fog(x) = f(g(x)) = f(x + 4)

=> 2(x + 4) + 1

=> 2x + 8 + 1

=> 2x + 9

The domain of fog(x) is the set of all real numbers R

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