三角行列式化简
最后的 -26 如何化解为0
1 2 0 1 1 2 0 1 1 2 0 1 1 2 0 1 1 2 0 1
2 4 -1 1 0 0 -1 -1 0 1 6 4 0 1 6 4 0 1 6 4
D=-1 3 4 2 =0 5 4 3 = — 0 5 4 3 = — 0 0 -26 -17 = 0 0 -1 -1
1 3 6 5 0 1 6 4 0 0 -1 -1 0 0 -1 -1 0 0-26 -17