Question

计算行列式的值:1 3 -1 21 -5 3 -40 2 1 -1-5 1 3 -31 3 -1 2 1 -5 3 -4

Answer 1

1 3 -1 2

1 -5 3 -4

0 2 1 -1

-5 1 3 -3

1 3 -1 2

0 -8 4 -6

0 2 1 -1

0 16 -2 7

1 3 -1 2

0 -8 4 -6

0 0 2 -5/2

0 0 6 5

1 3 -1 2

0 -8 4 -6

0 0 2 -5/2

0 0 0 25/2

答案=-200