| 4 1 2 4 |
问题描述:
| 4 1 2 4 |
| 1 2 0 2 |
| 10 5 2 0 |
| 0 1 1 7 |
答
见我之前的回答:4,1,2,41,2,0,210,5,2,00,1,1,7r2-(1/4)r1:4,1,2,40,7/4,-1/2,110,5,2,00,1,1,7r3-(5/2)r1:4,1,2,40,7/4,-1/2,10,5/2,-3,-100,1,1,7r3-(10/7)r2:4,1,2,40,7/4,-1/2,10,0,-16/7,-80/70,1,1,7r4-(4/7)...