Javascript Disabled Detected

You currently have javascript disabled. Several functions may not work. Please re-enable javascript to access full functionality.

Matrix Calculus Trouble

Started by RJPedro , Mar 16 2009 11:32 AM

Please log in to reply

5 replies to this topic

#1 RJPedro

Newbie

Members
7 posts

Calculators:
casio classpad 300 ; casio FX 880 P

Posted 16 March 2009 - 11:32 AM

Hello

I' m having problems solving this matrix calculus:

det(mat [26400,-13200;-13200,13200]-p²*mat[40,0;0,40]=0)

Can anyone help me solve thisâ¦

The answer is pI=11.23;pII=29.39

Best regards

RJP

Back to top

#2 afshin_electronic

Casio Addict

Members
50 posts

Calculators:
casio classpad 300plus
casia fx-991ms

Posted 16 March 2009 - 06:29 PM

Hello

I' m having problems solving this matrix calculus:

det(mat [26400,-13200;-13200,13200]-p²*mat[40,0;0,40]=0)

Can anyone help me solve thisâ¦

The answer is pI=11.23;pII=29.39

Best regards

RJP

its simple ...
first of all , you can not use matrices to form an equation in CP ....
secondly you can not get the determinant of an equation, like you have written above!!!

try this:

det(mat [26400,-13200;-13200,13200]-p²*mat[40,0;0,40])=0

instead of :

det(mat [26400,-13200;-13200,13200]-p²*mat[40,0;0,40]=0)

and then solve it for p ...
you'll get 4 answers for that, including those two you have mentioned above ....

Back to top

#3 RJPedro

Newbie

Members
7 posts

Calculators:
casio classpad 300 ; casio FX 880 P

Posted 17 March 2009 - 09:31 AM

I'm sorry to say, it comes out …”no solution”… I don’t know what to say, I did everything you said but it did not work…

I must say I have a CP 300 is there anything about my calculator model that makes it impossible to calculate this equation on it???

Help me please

Regards

RJP

Back to top

#4 Guest_Tabaco_*

Guests

Posted 13 October 2009 - 08:59 PM

Uffff......... Acabo de comprar una ClassPad 330 y resulta que no puede sacar la inversa de una matriz de 20x20 elementos !!!! ( truena por falta de memoria, aunque utilice el 100% que trae la calculadora !!!!, ademÃ¡s de que es muy lento el poder introducir los valores, ya que tienes que estar "esperando" a que la calculadora registre el valor para poder ingresar otro, si no el siguiente valor lo introduce en la misma posiciÃ³n )

y en una Fx2.0 PLUS ni se queja para hacer este cÃ¡lculo !!

tengo dudas con esta calculadora........ habrÃ© realizado una buena inversiÃ³n $$ ??

Back to top

#5 diiego06

Newbie

Members
17 posts

Gender:Male
Location:Cbba-Bolivia
Calculators:
ClassPad 300

Posted 18 October 2009 - 02:02 AM

para resolver ese problema, tambiÃ©n podrÃas utilizar la funciÃ³n LUinverse del LNA, para poder usarlo necesitas el CPLua, ambos el LNA y el CPLua deberÃas poder descargarlos del foro. si necesitas mas infromaciÃ³n solo me preguntas.

Back to top

#6 McCoy

Casio Addict

Members
68 posts

Interests:play around with figures.
Calculators:
CFX - 9850 GB PLUS,Classpad 330, TI-89 Titanium.

Posted 10 November 2009 - 10:15 AM

Hello

[/size]

I' m having problems solving this matrix calculus:

det(mat [26400,-13200;-13200,13200]-p²*mat[40,0;0,40]=0)

Can anyone help me solve thisâ¦

The answer is pI=11.23;pII=29.39

Best regards

[size="3"]RJP

try:
solve(det([[26400,-13200][-13200,13200]]-p^2*[[40,0][0,40])=0,p)

Edited by McCoy, 10 November 2009 - 11:37 AM.

Back to top

Back to Classpad

1 user(s) are reading this topic

0 members, 1 guests, 0 anonymous users

Matrix Calculus Trouble

#1 RJPedro

#2 afshin_electronic

#3 RJPedro

#4 Guest_Tabaco_*

#5 diiego06

#6 McCoy

1 user(s) are reading this topic

Sign In