计算行列式:12-10 -145-1 2313 31-20

2024-12-29 00:47:01
推荐回答(1个)
回答1:

1 2 -1 0

-1 4 5 -1

2 3 1 3

3 1 -2 0
=
1 0 0 0

-1 6 4 -1

2 -1 3 3

3 -5 1 0
=
6 4 -1

-1 3 3

-5 1 0
=

26 4 -1

14 3 3

0 1 0
=(-1)^(3+2)×
|26 -1
14 3|
=-(26×3-(-1)×14)
=-(78+14)
=-92