给定n个节点xi[i=0,1,...,n-1]上的函数值yi=f[xi],用抛物插值公式计算指定插值点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], with parabolic interpolation formula specified interpolation points, t Department of function approximation of z = f [t]