3+r2,r2-2r1,r4-r1
2 -1 3 1
0 0 -1 2
0 0 -1 2
0 0 1 0
r3-r2,r1-3r4,r2+r4
2 -1 0 1
0 0 0 2
0 0 0 0
0 0 1 0
r2*(1/2),r1-r2
2 -1 0 0
0 0 0 1
0 0 0 0
0 0 1 0
c1+2c2,c2*(-1)
0 1 0 0
0 0 0 1
0 0 0 0
0 0 1 0
交换行(列)
1 0 0 0
0 1 0 0
0 0 1 0
0 0 0 0
3+r2,r2-2r1,r4-r1
2 -1 3 1
0 0 -1 2
0 0 -1 2
0 0 1 0
r3-r2,r1-3r4,r2+r4
2 -1 0 1
0 0 0 2
0 0 0 0
0 0 1 0
r2*(1/2),r1-r2
2 -1 0 0
0 0 0 1
0 0 0 0
0 0 1 0
c1+2c2,c2*(-1)
0 1 0 0
0 0 0 1
0 0 0 0
0 0 1 0
交换行(列)
1 0 0 0
0 1 0 0
0 0 1 0
0 0 0 0