Question

线性代数求逆矩阵

线性代数求逆矩阵这个具体过程怎么算啊。我算了很多次。总是错的。能不能帮我写下具体过程看看。谢谢

Answer 1

很明显可以用分块矩阵算，对两个2阶的对角块分别求逆

Answer 2

B =
[5 3]
[2 1]
B^(-1) =
[-1 3]
[2 -5]
C =
[1 -3]
[0 1]
C^(-1) =
[1 3]
[0 1]
A^(-1) =
[-1 3 0 0]
[ 2 -5 0 0]
[ 0 0 1 3]
[ 0 0 0 1]