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Anchi
post Nov 9 2006, 09:03 PM
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Treba mi pomoc od malo starijih, ili bilo koga ko zna da mi resi:

Neka je f:A-->B. Ako A ima m elemenata, a B n elemenata, koliko ima "na" odnosno surjektivnih funkcija?
Ja sam nesto pocela, ali ako neko zna da mi resi detaljno please!!!!!!!!!!!!
Bilo bi pozeljno da ga donesem uradjenog na analizu... Ajde 2d, vi bi barem trebalo da znate... pleaseeeeee :33gc2:
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pyost
post Nov 9 2006, 10:33 PM
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Ajde da probamo na primeru (ne znam kako da napisem viticastu zagradu..):

m=3, n=2

A=(a,b,c)

B=(1,2)

Mogucnosti su:

{{a \quad b \quad c} \choose {1 \quad 1 \quad 2}}

{{a \quad b \quad c} \choose {1 \quad 2 \quad 1}}

{{a \quad b \quad c} \choose {1 \quad 2 \quad 2}}

{{a \quad b \quad c} \choose {2 \quad 1 \quad 1}}

{{a \quad b \quad c} \choose {2 \quad 1 \quad 2}}

{{a \quad b \quad c} \choose {2 \quad 2 \quad 1}}

A to je 6...

Ajde ponovo da pravim formulu unsure.gif

m>=n. Svakom od n elemenata dodelimo jedan iz skupa A, koji ima m elemenata. To je m*(m-1)*...*(m-n+1). Onda nam ostaje m-n elemenata u skupu A koji nisu vezani ni za jedan iz B. Svaki od njih moze da zauzme bilo koji od n elemenata, pa je to n^(m-n). A sada cemo na primeru otkriti cime jos treba da se podeli biggrin.gif

3*2*{{2^1} \over \ {x}}

U ovom slucaju, x je 2, ali to ne pomaze.. Ajde da probamo za sledeci skup.




m=3, n=1

A=(a,b,c)

B=(1)

Tu ima jedna mogucnost.

{{a \quad b \quad c} \choose {1 \quad 1 \quad 1}}

3*{{1^2} \over \ {x}}

x je 3, znaci.. Nemam pojma laugh.gif

Odustajem sad.gif Ali ostajem pri tome da je forumula oblika

m*(m-1)*(m-2)*\quad\cdots\quad*(m-n+1)\quad{{n^{m-n}}\over{x}}

gde X ne znam sta je. Ali to naravno ne znaci da je ovo tacno smile.gif



Da sam na kontrolnom, lupio bih da je x=m-n+1, pa sta bude laugh.gif Ne moze da skodi..

m*(m-1)*(m-2)*\quad\cdots\quad*(m-n+1)\quad{{n^{m-n}}\over{m-n+1}}

<=>

m*(m-1)*(m-2)*\quad\cdots\quad*(m-n)*n^{m-n}

Prso sam...


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Posts in this topic
Anchi   Resenje Please!   Nov 9 2006, 09:03 PM
pyost   RE: Resenje Please!   Nov 9 2006, 09:34 PM
Anchi   RE: Resenje Please!   Nov 9 2006, 09:48 PM
pyost   RE: Resenje Please!   Nov 9 2006, 10:00 PM
Anchi   RE: Resenje Please!   Nov 9 2006, 10:03 PM
pyost   RE: Resenje Please!   Nov 9 2006, 10:33 PM
smorko_gusic   RE: Resenje Please!   Nov 9 2006, 10:41 PM
pyost   RE: Resenje Please!   Nov 9 2006, 10:44 PM
maxydelanoche   RE: Resenje Please!   Nov 9 2006, 11:07 PM
smorko_gusic   RE: Resenje Please!   Nov 9 2006, 11:09 PM
Anchi   RE: Resenje Please!   Nov 9 2006, 11:37 PM
pyost   RE: Resenje Please!   Nov 10 2006, 12:33 AM
smorko_gusic   RE: Resenje Please!   Nov 10 2006, 04:35 PM
^_NiN0_^   RE: Resenje Please!   Nov 10 2006, 06:54 PM
Anchi   RE: Resenje Please!   Nov 10 2006, 08:40 PM
Puzzler   RE: Resenje Please!   Nov 10 2006, 09:17 PM
RZA   RE: Resenje Please!   Nov 10 2006, 09:20 PM
Anchi   RE: Resenje Please!   Nov 10 2006, 10:06 PM
maxydelanoche   RE: Resenje Please!   Nov 10 2006, 11:49 PM
Puzzler   RE: Resenje Please!   Nov 11 2006, 09:24 AM
pyost   RE: Resenje Please!   Nov 11 2006, 01:45 PM
^_NiN0_^   RE: Resenje Please!   Nov 11 2006, 12:14 PM
Puzzler   RE: Resenje Please!   Nov 11 2006, 12:40 PM
pyost   RE: Resenje Please!   Nov 11 2006, 03:54 PM
Puzzler   RE: Resenje Please!   Nov 11 2006, 02:17 PM
jeele   RE: Resenje Please!   Nov 11 2006, 03:00 PM
jeele   RE: Resenje Please!   Nov 11 2006, 03:06 PM
Puzzler   RE: Resenje Please!   Nov 11 2006, 03:29 PM
Legenda   RE: Resenje Please!   Nov 11 2006, 10:01 PM
Anchi   RE: Resenje Please!   Nov 11 2006, 10:05 PM
^_NiN0_^   RE: Resenje Please!   Nov 12 2006, 12:29 AM
Anchi   RE: Resenje Please!   Nov 12 2006, 12:35 AM
^_NiN0_^   RE: Resenje Please!   Nov 12 2006, 03:40 PM
Anchi   RE: Resenje Please!   Nov 12 2006, 10:01 PM
pyost   RE: Resenje Please!   Nov 12 2006, 10:15 PM
Puzzler   RE: Resenje Please!   Nov 12 2006, 10:20 PM
pyost   RE: Resenje Please!   Nov 12 2006, 10:21 PM
Puzzler   RE: Resenje Please!   Nov 12 2006, 10:27 PM
Anchi   RE: Resenje Please!   Nov 12 2006, 11:34 PM
maxydelanoche   RE: Resenje Please!   Nov 12 2006, 11:59 PM
RZA   RE: Resenje Please!   Nov 13 2006, 12:36 AM
Puzzler   RE: Resenje Please!   Nov 13 2006, 08:31 AM
Anchi   RE: Resenje Please!   Nov 13 2006, 11:12 AM
RZA   RE: Resenje Please!   Nov 15 2006, 09:23 PM
pyost   RE: Resenje Please!   Nov 15 2006, 10:27 PM
RZA   RE: Resenje Please!   Nov 15 2006, 11:32 PM
Anchi   RE: Resenje Please!   Nov 16 2006, 08:00 PM
RZA   RE: Resenje Please!   Nov 16 2006, 10:34 PM
Anchi   RE: Resenje Please!   Nov 17 2006, 12:47 AM
Puzzler   RE: Resenje Please!   Nov 17 2006, 10:45 PM
maxydelanoche   RE: Resenje Please!   Nov 21 2006, 06:20 PM
SerGrimReaper   RE: Resenje Please!   Nov 21 2006, 08:15 PM
pyost   RE: Resenje Please!   Nov 21 2006, 08:18 PM
SerGrimReaper   RE: Resenje Please!   Nov 21 2006, 08:22 PM
RZA   RE: Resenje Please!   Nov 21 2006, 11:02 PM
Anchi   RE: Resenje Please!   Nov 22 2006, 01:37 PM
RZA   RE: Resenje Please!   Nov 22 2006, 10:44 PM
SerGrimReaper   RE: Resenje Please!   Nov 22 2006, 04:08 PM
maxydelanoche   RE: Resenje Please!   Nov 24 2006, 07:09 PM
RZA   RE: Resenje Please!   Nov 24 2006, 07:52 PM
jeele   RE: Resenje Please!   Nov 25 2006, 02:43 PM
RZA   RE: Resenje Please!   Nov 25 2006, 03:15 PM
maxydelanoche   RE: Resenje Please!   Nov 26 2006, 07:35 AM
SerGrimReaper   RE: Resenje Please!   Nov 26 2006, 03:11 PM
RZA   RE: Resenje Please!   Nov 26 2006, 03:41 PM
Eli0t   RE: Resenje Please!   Nov 26 2006, 03:56 PM
SerGrimReaper   RE: Resenje Please!   Nov 26 2006, 04:34 PM
Ana   RE: Resenje Please!   Dec 30 2006, 10:03 PM
jeele   RE: Resenje Please!   Mar 23 2008, 06:51 PM
Nostradamus   RE: Resenje Please!   Mar 23 2008, 07:34 PM
jeele   RE: Resenje Please!   Mar 23 2008, 08:00 PM
pyost   RE: Resenje Please!   Mar 23 2008, 08:03 PM
jeele   RE: Resenje Please!   Mar 23 2008, 08:40 PM
The snorks   RE: Resenje Please!   Mar 23 2008, 09:36 PM
Nostradamus   RE: Resenje Please!   Mar 24 2008, 09:15 AM
Puzzler   RE: Resenje Please!   Mar 24 2008, 02:03 PM
jeele   RE: Resenje Please!   Mar 24 2008, 04:46 PM


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