给定n个节点xi[i=0,1,...,n-1]上的函数值yi=f[xi]及精度要求，用埃特金逐步插值法计算指定插值点t处的函数近似值z=f[t]-Given n nodes xi [i = 0,1 ,..., n-1] on the function values yi = f [xi] and the accuracy requirements gradually Aitken interpolation method specified interpolation points t Department approximation of the function z = f [t]