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UBA - CienciaS • Ver Tema - [Resuelto] 2ºParcial verano 2007
UBACS Q&A Foro WikiCS
Fecha actual 12 May 2024, 17:36




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 Asunto: [Resuelto] 2ºParcial verano 2007
NotaPublicado: 18 Jun 2008, 12:50 
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Registrado: 09 May 2008, 15:44
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Calcular el resto de dividir por 68 a:



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 Asunto: Re: [A resolver] 2ºParcial verano 2007
NotaPublicado: 18 Jun 2008, 17:17 
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Este ejercicio es para usar el teorema chino del resto. Bueno, ahora, una resolución:

Dos cosas; en un momento dije que la solución es única; esto es cierto mirando congruencias, o lo que es lo mismo, mirando ''b'' como resto.
La otra aclaración es como calculé el último paso; no hice nada raro, es usar el teorema chino del resto, de vuelta. Espero haber sido claro( y no haber cometido errores...). Saludos.



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 Asunto: Re: [A resolver] 2ºParcial verano 2007
NotaPublicado: 18 Jun 2008, 19:37 
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Si, esta bien, y lo hice de la misma manera y me dio lo mismo (Y)

Pero... si en vez de separar el 68 en 4*17, uso directamente el 68 tengo que
Entonces, con el mismo analisis, los restos de los sumandos em quedan 2 + 4 - 4 -4 -4 -4 ..... -4 -4. Pero tomo mod 68 a eso y me da 22 no 14.... donde esta el problema???


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 Asunto: Re: [A resolver] 2ºParcial verano 2007
NotaPublicado: 18 Jun 2008, 20:55 
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Gracias por la ayuda!

Nico.. el problema en lo que vos pusiste es que el primer 4 lo estás sumando.. hiciste 2 + 4 - 4 ... cuando debería ser 2 - 4 - 4 ... con eso da perfecto.

Edit:
No dije nada, me confundí, ese +4 estaba bien, no sé xq no da :S



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 Asunto: Re: [Resuelto] 2ºParcial verano 2007
NotaPublicado: 19 Jun 2008, 22:34 
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Porque estás haciendo , lo cual... está mal. Ojo con eso, en la resolución vale porque tengo 1 elevado a un exponente. Si tenés otra cosa... no ganás nada. Espero ser claro en donde está el error.



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 Asunto: Re: [Resuelto] 2ºParcial verano 2007
NotaPublicado: 20 Jun 2008, 22:20 
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Si, clarisimo despiste mio, muchas gracias!ª


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