Author presented a concise gradual derivation about higher derivative whose function defined by parametric equation.

求由参数方程所确定的函数的高阶导数，提出了一种较为直观、简便的逐次求导方法。

youdao

An infinitesimal amount, to look at the derivative. Once I do this, how many molecules are in this higher level now?

一个无限小的量，看看能得到什么，一旦我这样做，现在有多少分子能到达这个较高的能级？

youdao

Finally, the definition of higher relative derivative is given. Further, we give an interpretation by an example.

最后给出了高阶相对导数的定义，并通过实例加以说明。

youdao

Basically, the higher oil prices are, the more oil and derivative products will be sold, which should increase profits.

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As earnings season begins, the expectations are on the high end for Dow components that have exposure to higher energy and commodity prices like Exxon and Chevron, and on derivative plays like Caterpillar, each with an expected 25% in top line growth for the quarter, according to ConvergEx.

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