文章以推广多项式插值为目的，利用Lagrange插值基函数，采用初等方法给出了三维空间中的多项式插值及其误差公式，然后将其结果推广到n维空间的情形，最后给出了一个数值

例子．

-The article to promote the polynomial interpolation for the purpose of the use of Lagrange interpolation basis function, using elementary method, three-dimensional space of polynomial interpolation and its error formula, and then the results extended to the case of n-dimensional space, Finally, a numerical example.