六阶行列式主对角线上是a3a2a1d1f3d3副对角线上是b3b2b1c1c2c3
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发布时间:2022-05-12 10:25
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热心网友
时间:2023-10-25 11:44
用r4-r3(c1/a1)、r5-r2(c2/a2、r6-r1(c3/a3) 行列式化为三角形(一个《上三角》)
D=|a3..................................b3|
a2 .................b2
a1 b1
0 d1-b1c1/a1
0 d2-b2c2/a2
0..................................d3-b3c3/a3
=a3a2a1(d1-b1c1/a1)(d2-b2c2/a2)(d3-b3c3/a3)
=(a1d1-b1c1)(a2d2-b2c2)(a3d3-b3c3)
热心网友
时间:2023-10-03 10:47
用r4-r3(c1/a1)、r5-r2(c2/a2、r6-r1(c3/a3) 行列式化为三角形(一个《上三角》)
D=|a3..................................b3|
a2 .................b2
a1 b1
0 d1-b1c1/a1
0 d2-b2c2/a2
0..................................d3-b3c3/a3
=a3a2a1(d1-b1c1/a1)(d2-b2c2/a2)(d3-b3c3/a3)
=(a1d1-b1c1)(a2d2-b2c2)(a3d3-b3c3)