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1 1 -2 3 0
2 1 -6 4 -1
3 2 a 7 -1
1 -1 9 -1 7 r2-2r1,r3-3r1,r4-r1
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1 1 -2 3 0
0 -1 -2 -2 -1
0 -1 a+6 -2 -1
0 -2 11 -4 7 r1+r2,r3-r2,r4-2r2,r2*(-1)
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1 0 -4 5 1
0 1 2 2 1
0 0 a+8 0 0
0 0 15 0 9
æ¾ç¶åªæa+8=0æ¶ï¼æ¹ç¨ææéé¶è§£
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1 0 -4 5 1
0 1 2 2 1
0 0 0 0 0
0 0 1 0 3/5 r1+4r4,r2-2r4ï¼äº¤æ¢r2r3
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1 0 0 5 17/5
0 1 0 2 -1/5
0 0 1 0 3/5
0 0 0 0 0
å¾å°è§£åéc*(-5,-2,0,1)^T +(17/5,-1/5,3/5,0)^Tï¼c为常æ°
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