摘要
本文利用Cramer法则与Vandermonde行列式的结果，推导出了La－grange插值公式以及一些缺项的多项式的表达式。这是对Cramer法则及vander－monde行列式的一个很好的综合运用。
This paper deduces the Lagrange' s interpolation formula and the expression of some special polynomials by using Cramer' s rule and Vandermonde's determinant. It is a good exercise for students to use Cramer' s rule and Vandermonde's determinant.
