复合函数的导数是构成函数的导数之积。
The derivative of the composite function is the product of the derivatives of the components.
用函数的链式法则和乘积公式给出了参数函数和复合函数的高阶导数的计算公式。
The formulas calculating higher derivatives of parametric functions and composite functions are given by the chain rule and the product formula for derivatives.
本文建立了多元复合函数的二阶偏导数公式。
In this paper, the formula of partial derivative of second order on compound function of many varables is established.
通过在积分换元、微分方程求解、多（一）元复合函数求全微分、偏导数及高阶偏导数中的应用举例，论述了一阶微分的形式不变性在微积分学中的作用不应被忽略。
Based on the theory of differential geometry and geodesy, the second order differential equation and the first differential relationship are derived on the regional earth ellipsoid in this paper.
通过在积分换元、微分方程求解、多（一）元复合函数求全微分、偏导数及高阶偏导数中的应用举例，论述了一阶微分的形式不变性在微积分学中的作用不应被忽略。
Based on the theory of differential geometry and geodesy, the second order differential equation and the first differential relationship are derived on the regional earth ellipsoid in this paper.
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