Differential Calculus (id: a539d1100)

本题目来源于试卷: Differential Calculus，类别为 IB数学

[问答题]
Let $f^{\prime}(x)=x^{3}-9$ $x^{2}+24 x+3 $.
1. There are two points of inflection on the graph of f . Write down the x -coordinates of these points.
2. Let $h(x)=f^{\prime \prime}(x)$ . Explain why the graph of h has no points of inflection.

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