- #1
eherrtelle59
- 25
- 0
I thought I would ask this in the homework section.
I should be able to write down the eigenvectors and eigenvalues of diagonal and triangular matrices on sight.
M = \begin{bmatrix}
1 &0 \\[0.3em]
0 & x \\[0.3em]
\end{bmatrix}
vs.
M = \begin{bmatrix}
-1 & -1 \\[0.3em]
0 & x-(1/4) \\[0.3em]
\end{bmatrix}
Obviously, I can see in the diagonal matrix that eigenvalues are λ_1 =1 and λ_2 =x
Therefore, the eigenvectors are e_1= (1 0) and e_2 =(0 1)
Now for the triangular matrix: by sight, I can see λ_1 =-1 and e_1 = (1 0 )
What I cannot do is figure out (by looking at the matrix) that if λ_2=x-(1/4) then e_2 = (-1 x+(3/4) ) Any help would be much appreciated. Thanks!
Homework Statement
I should be able to write down the eigenvectors and eigenvalues of diagonal and triangular matrices on sight.
M = \begin{bmatrix}
1 &0 \\[0.3em]
0 & x \\[0.3em]
\end{bmatrix}
vs.
M = \begin{bmatrix}
-1 & -1 \\[0.3em]
0 & x-(1/4) \\[0.3em]
\end{bmatrix}
Homework Equations
The Attempt at a Solution
Obviously, I can see in the diagonal matrix that eigenvalues are λ_1 =1 and λ_2 =x
Therefore, the eigenvectors are e_1= (1 0) and e_2 =(0 1)
Now for the triangular matrix: by sight, I can see λ_1 =-1 and e_1 = (1 0 )
What I cannot do is figure out (by looking at the matrix) that if λ_2=x-(1/4) then e_2 = (-1 x+(3/4) ) Any help would be much appreciated. Thanks!