Question

求一个简单的三阶逆矩阵0 1 2 5 4 31 1 4 =A 4 2 0=B 求A-1*B(就是A的逆乘B)2 -1 0

Answer 1

A B A

[,1] [,2] [,3]

[1,] 0 1 2

[2,] 1 1 4

[3,] 2 -1 0

> B

[,1] [,2] [,3]

[1,] 5 4 3

[2,] 4 2 0

[3,] 1 2 3

solve(A)%*%B

[,1] [,2] [,3]

[1,] 7 8 9

[2,] 13 14 15

[3,] -4 -5 -6