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Latest posts from topic “Olimpiadi di matematica” Latest posts from topic “Olimpiadi di matematica” on “ElectroYou”. 2011-07-05T08:31:14Z https://www.electroyou.it/forum/viewtopic.php?f=41&t=27103 Re: Olimpiadi di matematica https://www.electroyou.it/forum/viewtopic.php?f=41&t=27103#p214156 alev 2011-07-05T15:22:30Z 2011-07-05T15:22:30Z
Ecco, lo sapevo #-o #-o :D

Grazie :ok:
Alessandro
 Re: Olimpiadi di matematica https://www.electroyou.it/forum/viewtopic.php?f=41&t=27103#p214146 lucbie 2011-07-05T14:58:26Z 2011-07-05T14:58:26Z
Beh, premesso che x corrisponde a [unparseable or potentially dangerous latex formula] e y corrisponde a [unparseable or potentially dangerous latex formula] e siccome mi interessa trovare y, riscrivo le equazioni esplicitando x:
x=y-\frac{91}{9}

x=\frac{9}{10}-y

Uguaglio i termini a destra e ottengo:
y-\frac{91}{9}=\frac{9}{10}-y

2y=\frac{9}{10}+\frac{91}{9}

y=\frac{81+910}{180}
 Re: Olimpiadi di matematica https://www.electroyou.it/forum/viewtopic.php?f=41&t=27103#p214115 alev 2011-07-05T13:26:33Z 2011-07-05T13:26:33Z
:oops: ho provato a seguire Foto Utentelucbie e fino alle due equazioni in due incognite nulla da eccepire, ma non ho capito come si arriva al risultato finale; è sicuramente banale ma non lo vedo :oops:

Ciao,
Alessandro
 Re: Olimpiadi di matematica https://www.electroyou.it/forum/viewtopic.php?f=41&t=27103#p214113 sebago 2011-07-05T13:04:05Z 2011-07-05T13:04:05Z
:ok: =D>
 Re: Olimpiadi di matematica https://www.electroyou.it/forum/viewtopic.php?f=41&t=27103#p214100 lucbie 2011-07-05T12:09:02Z 2011-07-05T12:09:02Z
Beh, ho ricavato queste due relazioni:

[unparseable or potentially dangerous latex formula]

[unparseable or potentially dangerous latex formula]

Poi ho riapplicato la relazione data usando -1/9 :

[unparseable or potentially dangerous latex formula]

La prima si può riscrivere quindi così:

[unparseable or potentially dangerous latex formula]

La seconda con questa risultano due equazioni in due incognite.

y=\frac{91}{9}+x
y=\frac{9}{10}-x

Da cui risulta 991/180 .
 Re: Olimpiadi di matematica https://www.electroyou.it/forum/viewtopic.php?f=41&t=27103#p214052 RenzoDF 2011-07-05T09:27:38Z 2011-07-05T09:27:38Z
Troppo facile ... la lascio a Isidoro :mrgreen:
 Olimpiadi di matematica https://www.electroyou.it/forum/viewtopic.php?f=41&t=27103#p214049 sebago 2011-07-05T08:31:14Z 2011-07-05T08:31:14Z
Salve a tutti.
Durante gli esami di maturità ho conosciuto un collega che mi ha fatto vedere i testi di una gara a squadre delle olimpiadi di matematica. Ne ho trovato uno simpatico:
data la relazione
[unparseable or potentially dangerous latex formula] con x\neq 0\; e\; x\neq 1
determinare [unparseable or potentially dangerous latex formula].
Per un giorno non ne sono venuto a capo perché mi intestardivo a ...
Sono curioso di vedere quanti millisecondi ci impiegheranno i soliti geniacci di EY
Saluti