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分段函数求导,关键在于分段点的导数,一向按照导数的定义求左右导数的方法进行。这里介绍一种新的方法,利用分段函数导函数的左右极限来确定分段点的导数。
The derivation of the piecewise function depends on the derivative of the piecewise point. It has always been based on the definition of the derivative to find the left and right derivatives. Here we introduce a new method that uses the left and right limits of the piecewise function to determine the derivative of the segmentation point.