例2.证明范德蒙行列式111aa2asanaana.a= Ⅱ (a;-a,)Dn1<j<i<n... an-a'RS2.6行列式按一行（列）展开§2.6 行列式按一行（列）展开 例2.证明范德蒙行列式 1 2 3 2 2 2 2 1 2 3 1 1 1 1 1 1 2 3 1 1 1 1 ( ) n n n i j j i n n n n n n a a a a a a a a D a a a a a a    − − − − = = − 