插值
函数近似计算的插值法插值问题的提出及lagrange插值(编辑修改稿)
i ijixxxx0 )()( nj ,2,1,0 010( ) ( ) ( )()nniix x x x x xxx 1 ()n x 令 )(1 jn x则 )())(())(( 1110 njjjjjjj xxxxxxxxxx n+1次多项式 )())(())(()())(())(()(11101110njjjjjjjnjjj