Problem

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For $f(x)=9 x$ and $g(x)=\frac{1}{9} x$, find $(f \circ g)(x)$ and $(g \circ f)(x)$. Then determine whether $(f \circ g)(x)=(g \circ f)(x)$.

What is $(f \circ g)(x)$ ?
\[
(f \circ g)(x)=\square
\]

Answer

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Answer

Final Answer: \((f \circ g)(x)=\boxed{x}\)

Steps

Step 1 :The question is asking for the composition of the functions f and g, denoted as \((f \circ g)(x)\). This means we need to substitute \(g(x)\) into \(f(x)\). In this case, \(g(x) = \frac{1}{9} x\), so we need to substitute this into \(f(x) = 9x\).

Step 2 :The result shows that \((f \circ g)(x) = x\). This means that when we substitute \(g(x)\) into \(f(x)\), we get back the original input x.

Step 3 :Final Answer: \((f \circ g)(x)=\boxed{x}\)

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