Question

线性代数~~求解矩阵方程求解矩阵方程AX=B,其中A=123,221,343 ,B= 25,31,43~~求大神给个解题

Answer 1

一下子问这么多,难怪没人答

第一个

(A,B)=

0 2 -1 2 0

1 1 2 0 6

-1 -1 -1 4 0

r3+r2

0 2 -1 2 0

1 1 2 0 6

0 0 1 4 6

r1+r3,r2-2r3

0 2 0 6 6

1 1 0 -8 -6

0 0 1 4 6

r1*(1/2),r2-r1

0 1 0 3 3

1 0 0 -11 -9

0 0 1 4 6

r1r2

1 0 0 -11 -9

0 1 0 3 3

0 0 1 4 6

X=

-11 -9

3 3

4 6

另两个解法一样,不会再追问吧