A20010062
幼苗
共回答了22个问题采纳率:95.5% 举报
(A,E)=
1 1 -1 1 0 0
0 2 3 0 1 0
1 -1 0 0 0 1
r3-r1
1 1 -1 1 0 0
0 2 3 0 1 0
0 -2 1 -1 0 1
r3+r2
1 1 -1 1 0 0
0 2 3 0 1 0
0 0 4 -1 1 1
r3*(1/4),r1+r3,r2-3r3
1 1 0 3/4 1/4 1/4
0 2 0 3/4 1/4 -3/4
0 0 1 -1/4 1/4 1/4
r2*(1/2),r1-r2
1 0 0 3/8 1/8 5/8
0 1 0 3/8 1/8 -3/8
0 0 1 -1/4 1/4 1/4
所以 A^-1 =
3/8 1/8 5/8
3/8 1/8 -3/8
-1/4 1/4 1/4
1年前
1