①用初等行变换将矩阵化为约化阶梯型[1-13-1]2-1-143-22310-45②设ai(i=1,2,...,m)不全为0,bj(j=1,2,...,n)不全为0,且Am×n(m×n为下标)=[a1b1a1b2...a1bn]a2b1a2b2...a2bn......amb1amb2...ambn求矩阵Am×n(m×n

Question

①
用初等行变换将矩阵化为约化阶梯型
[1 -1 3 -1]
2 -1 -1 4
3 -2 2 3
1 0 -4 5
②
设ai(i=1,2,...,m)不全为0,bj(j=1,2,...,n)不全为0,且
Am×n(m×n为下标)=[a1b1 a1b2 ...a1bn ]
a2b1 a2b2 ...a2bn
...
...
amb1 amb2 ...ambn
求矩阵Am×n(m×n为下标)的秩.

Answer 1

发好了.请注意查收!