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farizriz231-Visitor
1-Visitor
May 4, 2020
Solved

help me solve this simple matrices determinant

how to find ω using mathcad??

1.

Screenshot_1.png

2.

Screenshot_2.png

AlanStevensAnswer
19-Tanzanite
May 4, 2020

Like so:

 

g0.JPG

Mathcad doesn't agree with your second example!

 

Alan

 

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4 replies

AlanStevens19-TanzaniteAnswer
19-Tanzanite
May 4, 2020

Like so:

 

g0.JPG

Mathcad doesn't agree with your second example!

 

Alan

 

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    LucMeekes23-Emerald IV
    23-Emerald IV
    May 4, 2020

    LucMeekes_0-1588588177101.png

    Success!
    Luc

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      Werner_E
      Werner_E25-Diamond I
      25-Diamond I
      May 4, 2020

      The snippet doesn't claim that the expression below the determinant IS the determinant, but even if we normalize in the equation the coefficient of omega^4 to 1 we get a different equation.
      So something is wrong in the snippet or the equation does not relate to the determinant above.

      Werner_E_0-1588601372169.png

       

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        Werner_E
        Werner_E25-Diamond I
        25-Diamond I
        May 4, 2020

        Just a fun a way to find the zeros without using the symbolics.

        You can use the numeric "root" function or alternatively a solve block to do the job.

        Werner_E_0-1588602395663.png

         

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