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#2
seidel2007-12-29 16:26
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1. 设函数f(x)=1/(1+25x?),-1≤x≤1,节点为xi=-1+0.2i(i=0,1,…,10).以为例编制Lagrange插值及三次样条Lagrange插值程序,要求:
⑴输出f(x)和Lagrange插值多项式L10(x)的值,其中x=-0.9+0.2k,k=0,1,…,9.
(2)计算相应的三次样条插值函数S(x)在x=-0.9+0.2k,k=0,1,…,9的值.