The formulas calculating higher derivatives of parametric functions and compositefunctions are given by the chain rule and the product formula for derivatives.
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。
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Business transactions might seem like a simple function to the invoking application, but they might be implemented as compositefunctions covered by their own transactional context.