Question

\( \left\{\begin{array}{l}f(x)=x^{3} \\\frac{d}{dx}(\frac{d}{dx}(f(x)))\end{array}\right. \)

Ask by Marshall Marsh. in China
Mar 18,2025

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Answer

因此,\( \frac{d}{dx}\left(\frac{d}{dx}(f(x))\right) = 6x \)

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Bonus Knowledge

To explore the fun side of calculus, let’s note that \( f(x) = x^3 \) is a classic example used to demonstrate how differentiation works. When you differentiate \( f(x) \) once, you get \( f'(x) = 3x^2 \). Differentiating again gives \( f''(x) = 6x \). So, \( \frac{d}{dx}(\frac{d}{dx}(f(x))) = 6x \), a linear function rising as your x-value increases! Now, imagine you're on a roller coaster designed around the function \( f(x) = x^3 \). The first derivative gives the slope of the hill at any point, signaling when you're climbing or descending. The second derivative helps gauge how steep it is. It's like having instant feedback on whether you're in for a thrill or a smooth ride as you zoom through the turns of calculus!

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