(10.5.8)--1.2.6行列式的计算举例（下）

1.nnaaaD11111111121方法1nnnnnaaaaaaaaaaaaD11111111111122211121nnnniinaaaaaaaaaa111111111111))(1(222121nnnnnaaaaaaaaaaaaD111111111111222111211000101111))(1(121niinaaaa1))(1(112niinaaaannaaaD111111111211rrinnaaaaaaaaaa0000000000000000000001111...