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UBA - CienciaS • Ver Tema - Uno de divisores positivos urgente! (No Resuelto)
UBACS Q&A Foro WikiCS
Fecha actual 12 May 2024, 16:32




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Autor Mensaje
 Asunto: Uno de divisores positivos urgente! (No Resuelto)
NotaPublicado: 18 Jul 2010, 14:46 
Estudiante

Registrado: 18 Nov 2009, 20:41
Mensajes: 25
Sea a perteneciente a los enteros, hallar el resto de dividir a por 16 sabiendo que (7a + 17: 5a + 3) tiene exactamente 4 divisores positivos.

Alguien tiene idea de como se hace esto? porfis, lo necesito antes del martes :?

Gracias!!!!!!!


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 Asunto: Re: Uno de divisores positivos urgente! (No Resuelto)
NotaPublicado: 18 Jul 2010, 15:37 
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Registrado: 21 Ago 2009, 17:53
Mensajes: 55
Primero vamos a calcular
Como no es múltiplo de el mcd no cambia si multiplico por
y como no es múltiplo de el mcd de los números no cambia si multiplica a por .

Luego
El mcd va a ser un divisor de y como tiene exactamente divisores positivos concluimos que
O sea, pero no es múltiplo de , o sea debe ser

Como multiplicamos por el inverso de módulo y nos queda , o sea tiene resto en la división por



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Daniel
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