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rvukasin
post Apr 28 2007, 07:20 PM
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Da li ima nekih vesti,kako su nasi uradili,kakvi su bili zadaci?


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^_NiN0_^
post Apr 28 2007, 11:48 PM
Post #2


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E ovo je bilo trivijalno ! kso.gif Imao bih zlato 'ladno ... mellow.gif

This post has been edited by ser_fanky Lj@B: Apr 28 2007, 11:48 PM


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rvukasin
post Apr 29 2007, 10:40 AM
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Group: Članovi
Joined: 15-September 06
From: Ub
Member No.: 103
Status: Učenik MGa
Ime i prezime: Vukasin Rankovic
Škola/Razred: Matematicka gimnazija 4c



QUOTE(ser_fanky Lj@B @ Apr 28 2007, 11:48 PM)
E ovo je bilo trivijalno !  kso.gif  Imao bih zlato 'ladno ...  mellow.gif
*


Mislim da bi znao 2 zad.
Dobio sam
f(x)=x^2
Naravno ne nagadjanjem
Ako treba mogu i da ispisem svoje resenje

evo mog resenja nadam se da je tacno:


Ako uzmemo da je  y=f(x)
dobicemo  f(2f(x)) = f(0) + 4f(x)^2
odnosno  f(2y)=f(0) + 4y^2 (*)
ako bi uzeli da je  x=0 i  y=f(0)
dobili bismo  f(2f(0)) = f(0) + 4f(0)^2
odnosno  f(2y)=y + 4y^2
smenom  m=2y dobijamo  f(m)={m\over 2} + m^2
kada bi to zamenili u pocetnu jednacinu  f(f(x) +y) = f(f(x) - y) + 4f(x)y
dobili bismo da je  y=0 a posto smo na pocetku uzeli da je  y=f(0)
dobijamo da je  f(0) = 0
iz (*) sledi da je  f(2f(x) = 0 + 4f(x)^2
odnosno  f(x) = y sledi  f(2y) = 4y^2
pa je  f(y) = y^2
sto je tacno i posle direktne provere

This post has been edited by ser_fanky Lj@B: Apr 29 2007, 11:07 AM


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Posts in this topic
rvukasin   BMO   Apr 28 2007, 07:20 PM
maxydelanoche   RE: BMO   Apr 28 2007, 10:26 PM
rvukasin   RE: BMO   Apr 28 2007, 10:34 PM
dushan   RE: BMO   Apr 28 2007, 11:45 PM
^_NiN0_^   RE: BMO   Apr 28 2007, 11:48 PM
rvukasin   RE: BMO   Apr 29 2007, 10:40 AM
dushan   RE: BMO   Apr 29 2007, 03:01 PM
^_NiN0_^   RE: BMO   Apr 29 2007, 11:07 AM
tijana   RE: BMO   Apr 29 2007, 01:33 PM
^_NiN0_^   RE: BMO   Apr 29 2007, 05:24 PM
dushan   RE: BMO   Apr 29 2007, 05:50 PM
^_NiN0_^   RE: BMO   Apr 29 2007, 05:54 PM
dushan   RE: BMO   Apr 29 2007, 06:03 PM
Cekaaa   RE: BMO   Apr 29 2007, 07:47 PM
Cekaaa   RE: BMO   Apr 29 2007, 09:14 PM
Iva   RE: BMO   Apr 29 2007, 10:35 PM
^_NiN0_^   RE: BMO   Apr 29 2007, 11:55 PM
Teodoros   RE: BMO   May 2 2007, 02:01 PM
Hannibal Lecter   RE: BMO   May 2 2007, 02:05 PM
^_NiN0_^   RE: BMO   May 2 2007, 03:19 PM
pyost   RE: BMO   May 2 2007, 03:24 PM
Gaara   RE: BMO   May 2 2007, 04:06 PM
Cekaaa   RE: BMO   May 2 2007, 07:16 PM
Teodoros   RE: BMO   May 3 2007, 08:32 AM
maxydelanoche   RE: BMO   May 2 2007, 09:32 PM


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