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Math Help - Matrices and complex numbers

  1. #1
    Member
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    Dec 2008
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    Matrices and complex numbers

    Hi,

    C = \left(\begin{array}{ccc}s&3&4\\1+s&1-s&2\\0&-1&1\end{array}\right)

    For which two complex values of s is C singular?

    a) What is meant by the term singular? Is it just ones across the matrix or something else entirely?

    b) How do I begin to work it out, what steps should I take?

    EDIT: I understand it now but thanks to anyone who attempted it for me
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  2. #2
    Super Member Deadstar's Avatar
    Joined
    Oct 2007
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    A matrix is singular if and only if its determinate equals 0.

    Ya know how to find the determinate of a 3x3 matrix?

    EDIT: Just saw your edit.
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