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Homework Help: Eigenvector question^^

  1. Nov 15, 2005 #1
    hey, not sure how this works on this web site but was just wondering if someone can tell me if i'm doing this right....

    find characteristic equation of matrix

    A=l 4 0 1 l
    l -2 1 0l
    l -2 0 1l

    i found it to be (L=lambda)...

    L^3 - 6L^2 + 11L - 6 = 0

    only because i solved the matrix det(LI - A) and found that

    =(L-4)[(L-1)(L-1)] -1[0 - (2)(L-1)] ...have i got this right? thanks for the help
  2. jcsd
  3. Nov 15, 2005 #2


    User Avatar
    Science Advisor
    Homework Helper

    Yes, that's right. Or just say:


    We use a formatting language called LaTex to format it in traditional form:

    \begin{array}{ccc} 4 & 0 & 1 \\
    -2 & 1 & 0 \\
    -2 & 0 & 1

    If you choose to post frequently here you may wish to learn it. Start by looking at the "General Physics" forum, top thread titled "Introducing LaTex".
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