(a,e)
=
3
2
1
1
0
0
3
1
5
0
1
0
3
2
3
0
0
1
r2-r1,
r3-r1
3
2
1
1
0
0
0
-1
4
-1
1
0
0
0
2
-1
0
1
r2-2r3,
r1-(1/2)r3
3
2
0
3/2
0
-1/2
0
-1
0
1
1
-2
0
0
2
-1
0
1
r1+2r2
3
0
0
7/2
2
-9/2
0
-1
0
1
1
-2
0
0
2
-1
0
1
r1*(1/3),
r2*(-1),
r3*(1/2)
1
0
0
7/6
2/3
-3/2
0
1
0
-1
-1
2
0
0
1
-1/2
0
1/2
满意请采纳
^_^
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