在结点互异或结点重合时，将函数差商与其导数之间的关系式推广为关于两个函数的情形。
Thie relationship between divided difference and derivative of a function can be generalized for two functions which the knots are distinct or the knots are coincident.
在结点互异或结点重合时，将函数差商与其导数之间的关系式推广为关于两个函数的情形。
Thie relationship between divided difference and derivative of a function can be generalized for two functions which the knots are distinct or the knots are coincident.
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