可以通过隐函数微分法和乘法法则得到，或者直接,把关于x，y，z的偏微分放进来。
You can get this either by implicit differentiation and the product rule, or you could get this just by putting here, here,and here the partial derivatives of this with respect to x, y, and z.
在证明中采用了一种把网微分法与条件矩母函数相结合应用于随机选择系统强极限定理研究的一种途径。
In the proof, the tools of the conditional moment generating function and the differentiation on a net for the study on strong limit theorems in the random selection system are applied.
本文明确表达了反函数微分法则的逆定理，基于此定理提出一种积分法，并举例说明了其运用方法。
This article explicitly expressed converse theorem of the inverse function differential principle, Based on this theorem, the author proposed one kind of integration, then gave some examples.
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