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Math Help - What kind of a problem is this?

  1. #1
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    What kind of a problem is this?

    I have the following problem to solve but don't recognise what type of problem this actually is let alone how to solve it:

    Determine those values of k for which

    | k k | = 0
    | 8 4k |

    the | are supposed to be continuous lines.

    Is this comething to do with eigenvectors/eigenvalues? or maybe complex numbers?


    Cheers,

    Alex.
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  2. #2
    MHF Contributor

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    Given the matrix \left( {\begin{array}{cc}   a & b  \\   c & d  \\\end{array}} \right) then its determinant is \left| {\begin{array}{cc}   a & b  \\   c & d  \\<br />
\end{array}} \right| = ad - bc
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