[理工] [現代]-矩陣...
1.
問這種問題我都覺得不好意思..
4 0 3
(-3)det -8 -2 -8
-8 0 -7
我怎麼算都是 24 可是答案寫 -24 也 可以幫我確認一下嗎..
2.
2 0 3 4
4 4 6 7
= -20
2 2 1 1
2 2 0 1
= R (-2) 2 0 3 4
32
-----------> 0 0 4 5
R (-1)
34 2 2 1 1
0 0 -1 0
3+2 2 3 4
2(-1)
0 4 5
0 -1 0
從這邊算 我算到答案=-20 跟解答一樣
但是我再繼續 餘因子
1+1
(-2)*2(-1) 4 5
-1 0
4(0-(-5) = 20
怎麼這樣 我錯在哪裡阿@@
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