=1 5x1+6x2
=0 x1+5x2+6x3
(2) x2+5x3+6x4=0.
x3+5x4+6x5=0
x4+5x5=1 解因为
5
1D=0
0010D1=0
01D3=5D5=0
00
所以
65100651006510065100065100651010001065100065100651006510065100
0=665,65
05010=1507,D2=0605005010=703,D4=0605010
0=212,01
100016510006510065100065110001
00
0= 1145,6500
0= 395,65
x1=1507,x2= 1145,x3=703,x4= 395,x4=212.
665665665665665
λx1+x2+x3=0
9.问λ,µ取何值时,齐次线性方程组 x1+µx2+x3=0有非
x1+2µx2+x3=0零解？