|A|=
λ-1 -1 0
1 λ-3 0
3 2 λ-2
= (λ-2)[(λ-1)(λ-3)+1]
= (λ-2)(λ^2-4λ+4)
= (λ-2)^3.
所以 λ≠2 时,方程组只有零解.
当λ=2时,A=
1 -1 0
1 -1 0
3 2 0
-->
1 0 0
0 1 0
0 0 0
全部解为:c(0,0,1)^T
|A|=
λ-1 -1 0
1 λ-3 0
3 2 λ-2
= (λ-2)[(λ-1)(λ-3)+1]
= (λ-2)(λ^2-4λ+4)
= (λ-2)^3.
所以 λ≠2 时,方程组只有零解.
当λ=2时,A=
1 -1 0
1 -1 0
3 2 0
-->
1 0 0
0 1 0
0 0 0
全部解为:c(0,0,1)^T