
(2)第一行1 -5 2- 3 3 第二行5 3 6 -1 -1 第三行2 4 2 1 -6
1.
r2-2r1,r3-5r1
1 1 0 0 5
0 -1 1 2 -9
0 -2 2 2 -22
r3-2r2
1 1 0 0 5
0 -1 1 2 -9
0 0 0 -2 -4
2.
r2-r1-2r3,r3-2r1
1 -5 2 -3 3
0 0 0 0 8
0 14 -2 7 -12
(1)
1 0 1 0 -8
0 1 -1 0 13
0 0 0 1 2
(2)山信
[ 1, 0, 9/猛唯汪7, -1/2, 0]
[ 0, 1, -1/枝仔7, 1/2, 0]
[ 0, 0, 0, 0, 1]