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help me solve this simple matrices determinant

farizriz23
5-Regular Member

help me solve this simple matrices determinant

how to find ω using mathcad??

1.

Screenshot_1.png

2.

Screenshot_2.png

ACCEPTED SOLUTION

Accepted Solutions

Like so:

 

g0.JPG

Mathcad doesn't agree with your second example!

 

Alan

 

View solution in original post

4 REPLIES 4

Like so:

 

g0.JPG

Mathcad doesn't agree with your second example!

 

Alan

 

LucMeekes
23-Emerald III
(To:farizriz23)

LucMeekes_0-1588588177101.png

Success!
Luc

Werner_E
25-Diamond I
(To:LucMeekes)

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

 

Werner_E
25-Diamond I
(To:farizriz23)

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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