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UBA - CienciaS • Ver Tema - Final 01/03/11
UBACS Q&A Foro WikiCS
Fecha actual 17 May 2024, 19:19




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Autor Mensaje
 Asunto: Final 01/03/11
NotaPublicado: 25 Jul 2012, 11:58 
Ayudante de Segunda

Registrado: 23 Jul 2011, 13:33
Mensajes: 52
tengo algunas dudas con el siguiente ejercicio

Hallar todas las funciones e que satisfagan simultaneamente las siguientes condiciones:




Primero busqué las raíces de los polinomios característicos de cada uno, así obtuve las soluciones del homogéneo, ya en la segunda parte establezco para que constantes de cada función se me cumple lo pedido y en la tercera parte hago un análisis similar, pero ya teniendo en cuenta los condiciones que puse en ii) para las constantes.
Lo que no me termina de cerrar es el hecho de que se cumplan simultáneamente cosas para dos ecuaciones distintas, o sea, son ecuaciones distintas con constantes distintas. Si alguien me dice si estoy en buen camino.. gracias!!


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 Asunto: Re: Final 01/03/11
NotaPublicado: 25 Jul 2012, 15:15 
Estudiante

Registrado: 13 Jul 2012, 17:47
Mensajes: 26
Las soluciones generales son , . Como querés que en 0 valgan 0 las dos, tenés que y . Entonces las ecuaciones quedan: e . Si derivás las dos soluciones y las ponés en el cociente, te queda que ese límite es , así que para que el cociente tienda a 1 necesitás .


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 Asunto: Re: Final 01/03/11
NotaPublicado: 25 Jul 2012, 15:48 
Ayudante de Segunda

Registrado: 23 Jul 2011, 13:33
Mensajes: 52
sisi lo hice igual, perfecto! lo unico que cuando derivas, bajan el -4 y -3 y por eso termina quedando
gracias!


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 Asunto: Re: Final 01/03/11
NotaPublicado: 25 Jul 2012, 19:04 
Estudiante

Registrado: 13 Jul 2012, 17:47
Mensajes: 26


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