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www.tolkien.rs • Pogledaj temu - Matematika... x=y => 2=1

Matematika... x=y => 2=1

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 Matematika... x=y => 2=1

Postod BelGarion u Sre Jan 06, 2010 8:17 pm

Od pocetne predpostavke da je x=y dobijamo kontradikciju da je 2=1 a sve to samo koriscenjem osnovnih operacija.
Gde je greska?
Probajte da resite , meni je trebalo malo vise vremena iako je trivijalno.

x=y /+x
x+x=y+x
2x=y+x /-2y
2x-2y=y+x-2y
2(x-y)=x-y /:(x-y)
2=1
?!
Ja sam sebe manji komad,
veći deo čini nomad
a taj čudak nešto bunca,
njemu nikad dosta sunca.
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 Re: Matematika... x=y => 2=1

Postod Pauleta u Sre Jan 06, 2010 8:36 pm

mhh, dobar stos :)
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 Re: Matematika... x=y => 2=1

Postod BelGarion u Sre Jan 06, 2010 8:45 pm

Upravo tako. :)
Iako se iz ovog primera vidi kako je lako pogresiti ako samo za sekund zanemaris predpostavke..
Ja sam sebe manji komad,
veći deo čini nomad
a taj čudak nešto bunca,
njemu nikad dosta sunca.
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 Re: Matematika... x=y => 2=1

Postod Neosisani u Sub Jan 09, 2010 10:01 pm

Ovaj mi je lepsi:
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It is practically impossible to teach good programming to students that have had a prior exposure to BASIC: as potential programmers they are mentally mutilated beyond hope of regeneration.
-- Edsger W. Dijkstra, SIGPLAN Notices, Volume 17, Number 5
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 Re: Matematika... x=y => 2=1

Postod Elu Tingol u Ned Jan 10, 2010 2:01 am

Ovde je baš očigledno u čemu je greška. :)
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 Re: Matematika... x=y => 2=1

Postod Dain u Ned Jan 10, 2010 3:10 am

Mere, ali se pishe i^2 onda. :da: :feler:
"Willing is not enough, we must do. Knowing is not enough, we must apply."

"I don't like jellyfish, they're not a fish, they're just a blob
They don't have eyes, fins or scales, like a cod
They float about stingin' people in the seas
An' no one eats jellyfish with chips and mushy peas.
Get rid of them!"
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 Re: Matematika... x=y => 2=1

Postod lightmath u Ned Jan 10, 2010 8:52 am

T nije problem ni korenovanje negativnog broja ni pisanje i^2. Problem je sto kvadratni koren nema jedinstveno resenje vec uvek ima dva resenja pa dolazi do grananja a ovde je, pogresno, izabrana samo jedna grana.
Edicija naučne fantastike Radijant

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 Re: Matematika... x=y => 2=1

Postod Aqarius u Ned Jan 10, 2010 10:59 am

I upravo zbog toga se i ne definise kao i=koren(-1) nego kao i^2=-1
Ne osvrci se, mrmoti te sustizu!
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 Re: Matematika... x=y => 2=1

Postod Elu Tingol u Ned Jan 10, 2010 12:38 pm

:kvardratnirkoenuglavu:
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 Re: Matematika... x=y => 2=1

Postod Neosisani u Ned Jan 10, 2010 12:54 pm

Slika

It is practically impossible to teach good programming to students that have had a prior exposure to BASIC: as potential programmers they are mentally mutilated beyond hope of regeneration.
-- Edsger W. Dijkstra, SIGPLAN Notices, Volume 17, Number 5
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 Re: Matematika... x=y => 2=1

Postod lightmath u Pon Jan 11, 2010 5:25 pm

Edicija naučne fantastike Radijant

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 Re: Matematika... x=y => 2=1

Postod Sherif Gile u Pon Jan 11, 2010 6:09 pm

Matematičari su jedine veće začukotine od elektronaca :mrgreen:
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 Re: Matematika... x=y => 2=1

Postod Neosisani u Čet Jan 14, 2010 4:50 pm

Slika

It is practically impossible to teach good programming to students that have had a prior exposure to BASIC: as potential programmers they are mentally mutilated beyond hope of regeneration.
-- Edsger W. Dijkstra, SIGPLAN Notices, Volume 17, Number 5
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 Re: Matematika... x=y => 2=1

Postod vukoglav u Čet Feb 23, 2012 6:36 pm

I have a high art: “ I hurt with cruelty those who wound me “
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 Re: Matematika... x=y => 2=1

Postod nofutur u Sub Feb 25, 2012 7:06 pm

ako je x=y, onda ne može da se deli sa x-y jer je x-y=0
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