线性代数 第九题
2个回答
展开全部
S = A31 + 2A32 - 3A33 + 4A34 =
| 3 1 -1 2|
|-5 1 3 -4|
| 1 2 -3 4|
| 1 -5 3 -3|
S =
| 3 1 -1 2|
|-8 0 4 -6|
|-5 0 -1 0|
|16 0 -2 7|
S = (-1)*
|-8 4 -6|
|-5 -1 0|
|16 -2 7|
S = (-1)*
|-28 4 -6|
| 0 -1 0|
| 26 -2 7|
S =
|-28 -6|
| 26 7|
S = -40
| 3 1 -1 2|
|-5 1 3 -4|
| 1 2 -3 4|
| 1 -5 3 -3|
S =
| 3 1 -1 2|
|-8 0 4 -6|
|-5 0 -1 0|
|16 0 -2 7|
S = (-1)*
|-8 4 -6|
|-5 -1 0|
|16 -2 7|
S = (-1)*
|-28 4 -6|
| 0 -1 0|
| 26 -2 7|
S =
|-28 -6|
| 26 7|
S = -40
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