Hint
Hint
Recall the definition of the identity function, \(Id(x) = x\), and the definition of function composition, \((f \circ g)(x) = f(g(x))\).
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- Formula Booklet
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Answer
Complete Answer
For any function \(f\), we have \((f\circ Id)(x) = f(Id(x)) = f(x)\) for all \(x\in\mathbb{R}\).
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