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Probleme mate.

 
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CyPress

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Post Posted: 13-01-2014, 17:45:54 | Translate post to: ... (Click for more languages)

1. Determinati numerele naturale x si y care verifica relatia 2xy +x+y= 85

Multumesc anticipat. Am nevoie de ele urgent.



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BucovinA

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Post Posted: 13-01-2014, 18:18:12 | Translate post to: ... (Click for more languages)

x(2y+1) +y=85
x=(85-y)/(2y+1)
Si acum, pentru x=1, y=26, care verifica relatia.



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Fough

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Post Posted: 14-01-2014, 19:34:05 | Translate post to: ... (Click for more languages)

BucovinA wrote:
x(2y+1) +y=85
x=(85-y)/(2y+1)
Si acum, pentru x=1, y=26, care verifica relatia.

ce e asta O_O...in primul rand...ai dat 2 exemple care sunt si gresite -..iti bati si joc de om..sau chiar nu stii sa faci un calcul de clasa a 4-a. 52+26+1=79 dupa mine....ma rog....Problema asta are vreo 20 de solutii pe putin...nu poti sa rezolvi o ecuatie cu 2 necunoscute printr-o SINGURA ECUATIE....trebuie 2.



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BucovinA

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Post Posted: 16-01-2014, 11:56:10 | Translate post to: ... (Click for more languages)

Ok Fough, nu am fost atent la calcule, si nu te mai da cocos, pentru ca merge sa rezolvi o ecuatie cu doua necunoscute, iar rationamentul e bun. Se scoate o necunoscuta in funtie de cealalta, si se dau valori. Spre exemplu, o solutie a problemei este y=0,x=85. Salut!


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Fough

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Post Posted: 16-01-2014, 13:48:21 | Translate post to: ... (Click for more languages)

n-am zis ca nu merge...doar ca are foarte multe solutii...invata sa citesti Sigh


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CyPress

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Post Posted: 18-01-2014, 00:49:22 | Translate post to: ... (Click for more languages)

Nu va mai certati. Am rezolvat-o. Multumesc amandurora.

Puteti da T/C



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Khajiit

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Post Posted: 18-01-2014, 00:54:22 | Translate post to: ... (Click for more languages)

Spune-mi si mie cum ai rezolvat tu aceasta problema avand doar acel sistem.
Nu ai cum, nici prin calculul cu matrici/determinanti si restul nu ai sa poti face asta.(tinand cont de exercitiul dat de tine).

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