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UBA - CienciaS • Ver Tema - [A Resolver] Práctica 5 (2009) - Ej 31
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 Asunto: [A Resolver] Práctica 5 (2009) - Ej 31
NotaPublicado: 13 Dic 2009, 18:23 
Vago
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Registrado: 29 Abr 2009, 20:33
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Buenas, dejo uno de los últimos de la práctica 5.

Sean y tales que . Hallar el resto de la división de por 44.


gracias!!


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 Asunto: Re: [A Resolver] Práctica 5 (2009) - Ej 31
NotaPublicado: 14 Dic 2009, 21:43 
Estudiante
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Registrado: 14 Nov 2009, 10:04
Mensajes: 22
Hola! esto es lo que yo pensé.

Luego

Como 22 y 5 son coprimos, sigue que



Usando algoritmo de Euclides o a ojo encontrás que -9 es el inverso multiplicativo de 17 módulo 22, y obtenés:


Como 22=2*11, sigue que:
y

Luego, como a es impar, debe ser:
y


o

y


Y te quedan dos sistemas con solución única por teorema chino del resto.
Luego restaría ver que las soluciones que encontraste verifiquen el enunciado.

Espero haber sido de ayuda.

Nina.



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Nina
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 Asunto: Re: [A Resolver] Práctica 5 (2009) - Ej 31
NotaPublicado: 16 Dic 2009, 18:32 
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Registrado: 29 Abr 2009, 20:33
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gracias Nina!.. no se me había ocurrido encararlo asi :D


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 Asunto: Re: [A Resolver] Práctica 5 (2009) - Ej 31
NotaPublicado: 16 Jun 2010, 11:30 
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