请问这个增广矩阵如何化成行最简

网友回答

2 7 3 1 61 3 -1 1 -2
7 -3 -2 6 -4
row1-2*row2
0 1 5 -1 10
1 3 -1 1 -2
7 -3 -2 6 -4
row3-7*row2
0 1 5 -1 10
1 3 -1 1 -2
0 -24 5 -1 10
row3-row1
0 1 5 -1 10
1 3 -1 1 -2
0 -25 0 0 0
x2=0继续化简,设x4=t
0 0 1 -1/5 2
1 0 -1 1 -2
0 1 0 0 00 0 0 1 t0 0 1 0 2+t/5
1 0 -1 0 -2-t
0 1 0 0 00 0 0 1 t0 0 1 0 2+t/5
1 0 0 0 -4t/5
0 1 0 0 00 0 0 1 tx3=2+t/5
x2=0x1=-4t/5
x4=t向量x=(2,0,0,0)+(1/5,0,-4/5,1)t
t是实数