化矩阵为单位矩阵(123 -111 032)
问题描述:
化矩阵为单位矩阵(123 -111 032)
答
1 2 3
-1 1 1
0 3 2
r2+r1得
1 2 3
0 3 4
0 3 2
r3-r2得
1 2 3
0 3 4
0 0 -2
(1/3)r2,(-1/2)r3得
1 2 3
0 1 4/3
0 0 1
r1-2r2,r2-(4/3)r3得
1 0 1/3
0 1 0
0 0 1
r1-(1/3)r3得
1 0 0
0 1 0
0 0 1