令 P=(a1,a2,a3) =
1 2 -2
2 -2 -1
2 1 2
由已知得
A(a1,a2,a3) = (a1,a2,a3)diag(1,2,3)
所以 A = (a1,a2,a3)diag(1,2,3)(a1,a2,a3)^-1=
7/3 0 -2/3
0 5/3 -2/3
-2/3 -2/3 2
令 P=(a1,a2,a3) =
1 2 -2
2 -2 -1
2 1 2
由已知得
A(a1,a2,a3) = (a1,a2,a3)diag(1,2,3)
所以 A = (a1,a2,a3)diag(1,2,3)(a1,a2,a3)^-1=
7/3 0 -2/3
0 5/3 -2/3
-2/3 -2/3 2