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> Mgf Mathletics, NERDZ only! XD

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Puzzler
post May 27 2007, 05:12 PM
Post #1





Group: Članovi
Joined: 2-July 06
Member No.: 74
Status: Van MGa
Škola/Razred: MG/IIb (proud of it)



E ovako...

Po cenu da zauvek budem obeležen kao najveći štreber na forumu, pokrećem ovu "igru" u nadi da će bar neko hteti da se igra.

Ideja je sledeća:
Učesnici redom postavljaju zadatke ISKLJUČIVO iz matematike, a onaj ko tačno reši, sledeći postavlja. Poll služi da, kao u igri "Pogodite igru" prikaže rezultate (čisto sumnjam da će biti više od 20 učesnika), i zamolio bih admine da je povremeno edituju biggrin.gif .
I još jedna stvar: Let's face it, nemojmo postavljati baš extra teške AKA takmičarske zadatke, ili one smarajuće iz knjiga, već nešto zaista interesantno, što zahteva razmišljanje, intelekt, i pre svega, talenat, a ne teoreme i that kind of crap.

Now...
Let the Games - BEGIN!

Zadatak[1]:
Ako je 2f(n)+{\frac {1}{2}}f({\frac {1}{n}})=n, odrediti f(2).


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Nostradamus
post Mar 7 2008, 02:02 AM
Post #2





Group: Članovi
Joined: 5-November 07
From: Bg
Member No.: 747
Status: Bivši učenik MGa



Pa dobro, postoji jedan krug, zato sto svaka 2 kruga pripadaju 1 pramenu, samim tim ona 2 disjunktna pripadaju hiperbolickom pramenu. Kako na svaki pramen postoji jedinstven upravan pramen, a za hiperbolicki to je elipticki, i prvi krug ce pripadati tom pramenu, zadatak se svodi na to koliko ima krugova upravnih na krug u date 2 tacke. Ako te tacke nisu dijametralno suprotne 1, ako jesu nijedan (u sustini tada ce prava biti upravna na taj krug)

Ovo sad bi trebalo da bude jednostavno

Neka su a, b, c \in \mathbb{R}+. Pokazati da vazi

\frac{1}{a+b} + \frac{1}{b+c} +\frac{1}{c+a} \leq \frac{1}{2a} + \frac{1}{2b} + \frac{1}{2c}

Edit: Ovde se nesto gadno izbagovao

This post has been edited by Nostradamus: Mar 7 2008, 02:03 AM


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 (a,b) \sim (c,d) \Leftrightarrow (a - c) \in \mathbb{Z}  \wedge  (b - d) \in \mathbb{Z}

\mathbb{T}^2\equiv\mathbb{R}^2/\sim
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Posts in this topic
Puzzler   Mgf Mathletics   May 27 2007, 05:12 PM
^_NiN0_^   RE: Mgf Mathletics   May 27 2007, 05:39 PM
Puzzler   RE: Mgf Mathletics   May 27 2007, 05:52 PM
pyost   RE: Mgf Mathletics   May 27 2007, 05:45 PM
Turgon   RE: Mgf Mathletics   May 30 2007, 11:39 PM
Pera Detlic   RE: Mgf Mathletics   May 31 2007, 12:30 AM
paydoman   RE: Mgf Mathletics   May 31 2007, 04:28 PM
pyost   RE: Mgf Mathletics   May 31 2007, 04:55 PM
Pera Detlic   RE: Mgf Mathletics   May 31 2007, 07:02 PM
pyost   RE: Mgf Mathletics   May 31 2007, 07:26 PM
RZA   RE: Mgf Mathletics   May 31 2007, 08:57 PM
NeverMore21   RE: Mgf Mathletics   May 31 2007, 09:17 PM
NeverMore21   RE: Mgf Mathletics   May 31 2007, 09:19 PM
Pera Detlic   RE: Mgf Mathletics   May 31 2007, 09:44 PM
NeverMore21   RE: Mgf Mathletics   May 31 2007, 10:07 PM
Pera Detlic   RE: Mgf Mathletics   May 31 2007, 10:12 PM
Grashak   RE: Mgf Mathletics   May 31 2007, 10:18 PM
Pera Detlic   RE: Mgf Mathletics   May 31 2007, 10:27 PM
NeverMore21   RE: Mgf Mathletics   May 31 2007, 10:19 PM
Grashak   RE: Mgf Mathletics   May 31 2007, 10:28 PM
Pera Detlic   RE: Mgf Mathletics   May 31 2007, 10:29 PM
Grashak   RE: Mgf Mathletics   May 31 2007, 10:30 PM
Pera Detlic   RE: Mgf Mathletics   May 31 2007, 10:31 PM
Grashak   RE: Mgf Mathletics   May 31 2007, 10:32 PM
NeverMore21   RE: Mgf Mathletics   May 31 2007, 10:29 PM
smorko_gusic   RE: Mgf Mathletics   May 31 2007, 10:30 PM
Grashak   RE: Mgf Mathletics   May 31 2007, 10:31 PM
NeverMore21   RE: Mgf Mathletics   May 31 2007, 10:32 PM
NeverMore21   RE: Mgf Mathletics   May 31 2007, 10:35 PM
Pera Detlic   RE: Mgf Mathletics   May 31 2007, 11:03 PM
Pera Detlic   RE: Mgf Mathletics   May 31 2007, 11:17 PM
smorko_gusic   RE: Mgf Mathletics   Jun 1 2007, 11:08 AM
pyost   RE: Mgf Mathletics   Jun 1 2007, 05:41 PM
rvukasin   RE: Mgf Mathletics   Jun 1 2007, 06:20 PM
rvukasin   RE: Mgf Mathletics   Jun 2 2007, 04:35 PM
paydoman   RE: Mgf Mathletics   Jun 9 2007, 04:48 PM
rvukasin   RE: Mgf Mathletics   Jun 9 2007, 08:28 PM
Nostradamus   RE: Mgf Mathletics   Feb 3 2008, 03:57 PM
maxydelanoche   RE: Mgf Mathletics   Jun 2 2007, 05:02 PM
rvukasin   RE: Mgf Mathletics   Jun 2 2007, 05:33 PM
^_NiN0_^   RE: Mgf Mathletics   Jun 9 2007, 08:39 PM
Puzzler   RE: Mgf Mathletics   Jun 9 2007, 08:54 PM
rvukasin   RE: Mgf Mathletics   Jun 9 2007, 10:00 PM
^_NiN0_^   RE: Mgf Mathletics   Jun 9 2007, 09:01 PM
maxydelanoche   RE: Mgf Mathletics   Jun 11 2007, 08:08 PM
Pera Detlic   RE: Mgf Mathletics   Jun 11 2007, 08:29 PM
paydoman   RE: Mgf Mathletics   Jun 14 2007, 10:41 PM
Wolfbrother   RE: Mgf Mathletics   Feb 18 2008, 08:29 PM
username   RE: Mgf Mathletics   Feb 19 2008, 03:32 PM
pyost   RE: Mgf Mathletics   Feb 19 2008, 03:37 PM
username   RE: Mgf Mathletics   Feb 19 2008, 04:20 PM
Nostradamus   RE: Mgf Mathletics   Feb 19 2008, 08:20 PM
VIP <3   RE: Mgf Mathletics   Feb 21 2008, 03:34 PM
username   RE: Mgf Mathletics   Feb 19 2008, 10:11 PM
Nostradamus   RE: Mgf Mathletics   Feb 21 2008, 03:14 PM
username   RE: Mgf Mathletics   Feb 21 2008, 04:12 PM
Nostradamus   RE: Mgf Mathletics   Feb 23 2008, 02:34 AM
Wolfbrother   RE: Mgf Mathletics   Feb 23 2008, 09:17 AM
Nostradamus   RE: Mgf Mathletics   Feb 23 2008, 01:42 PM
username   RE: Mgf Mathletics   Feb 23 2008, 01:09 PM
Wolfbrother   RE: Mgf Mathletics   Feb 23 2008, 03:55 PM
Wolfbrother   RE: Mgf Mathletics   Feb 23 2008, 04:23 PM
Nostradamus   RE: Mgf Mathletics   Feb 24 2008, 08:51 PM
username   RE: Mgf Mathletics   Feb 24 2008, 08:54 PM
Nostradamus   RE: Mgf Mathletics   Feb 24 2008, 09:03 PM
username   RE: Mgf Mathletics   Feb 24 2008, 09:06 PM
pyost   RE: Mgf Mathletics   Feb 24 2008, 09:06 PM
Wolfbrother   RE: Mgf Mathletics   Feb 25 2008, 05:40 PM
Nostradamus   RE: Mgf Mathletics   Feb 25 2008, 06:50 PM
Wolfbrother   RE: Mgf Mathletics   Feb 25 2008, 06:53 PM
Wolfbrother   RE: Mgf Mathletics   Feb 25 2008, 07:14 PM
Wolfbrother   RE: Mgf Mathletics   Feb 25 2008, 07:28 PM
Nostradamus   RE: Mgf Mathletics   Feb 25 2008, 07:30 PM
Wolfbrother   RE: Mgf Mathletics   Feb 25 2008, 07:30 PM
Nostradamus   RE: Mgf Mathletics   Feb 29 2008, 02:49 AM
Wolfbrother   RE: Mgf Mathletics   Feb 27 2008, 12:26 PM
Nostradamus   RE: Mgf Mathletics   Feb 27 2008, 05:14 PM
Wolfbrother   RE: Mgf Mathletics   Feb 27 2008, 05:15 PM
Wolfbrother   RE: Mgf Mathletics   Feb 29 2008, 08:17 AM
Nostradamus   RE: Mgf Mathletics   Feb 29 2008, 03:32 PM
Nostradamus   RE: Mgf Mathletics   Mar 2 2008, 04:23 PM
Wolfbrother   RE: Mgf Mathletics   Mar 2 2008, 04:23 PM
Nostradamus   RE: Mgf Mathletics   Mar 2 2008, 04:25 PM
Wolfbrother   RE: Mgf Mathletics   Mar 2 2008, 04:27 PM
Nostradamus   RE: Mgf Mathletics   Mar 2 2008, 04:29 PM
username   RE: Mgf Mathletics   Mar 2 2008, 04:32 PM
Nostradamus   RE: Mgf Mathletics   Mar 2 2008, 04:33 PM
Wolfbrother   RE: Mgf Mathletics   Mar 2 2008, 04:40 PM
Nostradamus   RE: Mgf Mathletics   Mar 2 2008, 04:48 PM
username   RE: Mgf Mathletics   Mar 2 2008, 04:55 PM
Nostradamus   RE: Mgf Mathletics   Mar 3 2008, 02:42 PM
username   RE: Mgf Mathletics   Mar 3 2008, 05:20 PM
Nostradamus   RE: Mgf Mathletics   Mar 5 2008, 06:04 PM
Wolfbrother   RE: Mgf Mathletics   Mar 5 2008, 07:32 PM
Nostradamus   RE: Mgf Mathletics   Mar 7 2008, 02:02 AM
Wolfbrother   RE: Mgf Mathletics   Mar 7 2008, 01:04 PM
Wolfbrother   RE: Mgf Mathletics   Mar 7 2008, 01:10 PM
Nostradamus   RE: Mgf Mathletics   Mar 7 2008, 08:51 PM
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