12 13 14
15 16 17
18 19 20
The answer is no because the determinant is zero. How do I figure out the determinant
Does this matrix have an inverse?
2013-02-01 3:39 am
回答 (2)
2013-02-01 8:13 pm
✔ 最佳答案
The algorithm is too long to explain here. I'd google for it.det=12*(16*20-17*19)-13*(15*20-17*18)+14*(15*19-16*18)
2013-02-03 7:25 pm
12 13 14
15 16 17
18 19 20
3 3 3
15 16 17 (R2 - R1)
18 19 20
3 3 3
3 3 3 (R3 - R2)
18 19 20
0 0 0
3 3 3 (R2 - R1)
18 19 20
If the row of a matrix is all 0s, the determinant of that matrix is 0.
The uppermost row of the matrix is all 0s.
Therefore, the determinant is 0.
15 16 17
18 19 20
3 3 3
15 16 17 (R2 - R1)
18 19 20
3 3 3
3 3 3 (R3 - R2)
18 19 20
0 0 0
3 3 3 (R2 - R1)
18 19 20
If the row of a matrix is all 0s, the determinant of that matrix is 0.
The uppermost row of the matrix is all 0s.
Therefore, the determinant is 0.
收錄日期: 2021-05-01 14:40:46
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20130131193933AAlJXke