由向量组构成矩阵,用初等行变换化为梯矩阵,非零行数即向量组的秩
(a1^T,a2^T,a3^T,a4^T,a5^T) =
1 0 3 1 2
-1 3 0 -1 1
2 1 7 2 5
4 2 14 0 6
r2+r1,r3-2r1,r4-4r1
1 0 3 1 2
0 3 3 0 3
0 1 1 0 1
0 2 2 -4 -2
r2-3r3,r4-2r3
1 0 3 1 2
0 0 0 0 0
0 1 1 0 1
0 0 0 -4 -4
所以向量组的秩为3.
由向量组构成矩阵,用初等行变换化为梯矩阵,非零行数即向量组的秩
(a1^T,a2^T,a3^T,a4^T,a5^T) =
1 0 3 1 2
-1 3 0 -1 1
2 1 7 2 5
4 2 14 0 6
r2+r1,r3-2r1,r4-4r1
1 0 3 1 2
0 3 3 0 3
0 1 1 0 1
0 2 2 -4 -2
r2-3r3,r4-2r3
1 0 3 1 2
0 0 0 0 0
0 1 1 0 1
0 0 0 -4 -4
所以向量组的秩为3.