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UBA - CienciaS • Ver Tema - [No Resuelto] Practica 3 - Ej. 13
UBACS Q&A Foro WikiCS
Fecha actual 20 May 2024, 08:52




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 Asunto: [No Resuelto] Practica 3 - Ej. 13
NotaPublicado: 02 Oct 2010, 16:58 
Estudiante

Registrado: 30 Abr 2010, 20:34
Mensajes: 35
Hola!!
Aunque está medio muerta esta sección del foro, posteo este problema a ver si la revivimos un poco y alguien me puede ayudar :P

13) Determinar todas las circunferencias en el plano sobre las cuales vale la siguiente igualdad:



Es la práctica de Green, así que estuve probando, pero me mareo...
Dice circunferencias en general, o sea que no necesariamente están en el origen, no?


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 Asunto: Re: [No Resuelto] Practica 3 - Ej. 13
NotaPublicado: 04 Oct 2010, 23:22 
Doctor
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Registrado: 25 Ago 2009, 12:04
Mensajes: 371
Ubicación: R^4
Yo lo que hize fue aplicar el Teorema de Green e intentar obtener algún dato del radio. Tomé y

Entonces:



Realizé un cambio de variables con polares, evalué las integrales igualando a seis Pi y despejé un R que ahora no me acuerdo cuanto era...

Saludos...



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"What we observe is not nature itself, but nature exposed to our method of questioning..."
Werner Heisenberg
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 Asunto: Re: [No Resuelto] Practica 3 - Ej. 13
NotaPublicado: 05 Oct 2010, 16:01 
Estudiante

Registrado: 30 Abr 2010, 20:34
Mensajes: 35
Hola!!

Muchas gracias por tu respuesta! :)

Hice lo que decís y llegué a una relación entre el radio y el corrimiento sobre el eje y de la circunferencia

A me dio que siendo b el corrimiento (positivo) sobre el eje y, y r el radio...
Si daba distinto me habré equivocado en alguna de las cuentas.. pero la idea quedó :) , gracias de nuevo!!

Saludos!^^


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