求矩阵A=1 -2 1 1 1 1 -2 1 -1 -1 1 -2 1 -5 5的秩

2024-12-03 14:58:27
推荐回答(1个)
回答1:

解: r2-r1,r3-r1
1 -2 1 1 1
0 0 0 -2 -2
0 0 0 -6 4

r3-3r2
1 -2 1 1 1
0 0 0 -2 -2
0 0 0 0 10

r(A) = 3