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Thread starter
Nov 02 2009 +
NeoKyler
71 Scania Ranger
 
Alright, so my math teacher was looking up riddles and puzzles when he stumbled onto this one: 2=1
At first I didn't believe him till he wrote and all down, it actually make sense if you take it step by step.
a = b Suppose a=1 and b=1
a+a = a+b Add 'a' to both sides
2a = a+b a+a=2a (1+1=2*a)
2a-2b = a+b-2b Subtract 2b from both sides
2(a-b) = a+b-2b 2a-2b = 2(a-b)
2(a-b) = a-b b-2b = -b (1-2=-1)
2 = 1 Divide both sides by a-b

Now this statement is FALSE, I would have you post your comments about why YOU think it's wrong but you have the internet as a tool so what's the use?
I will save you the time from looking it up and tell you why it's wrong.
Notice the very last step: Divide both sides by a-b
This is impossible when a and b are converted into numbers: Divide both sides by 1-1
You should know already that it is impossible to divide any number by 0.
Since this is algebra it is correct and incorrect at the same time, just depends on your point of view I guess...
Poll - I have proof that 2=1
6%
10 votes   This is cool!
28%
42 votes   Lame
47%
70 votes   I knew the answer! (Because I'm smart, I cheated, I saw this already, etc etc.)
17%
25 votes   I'm confused...
Replies
11/04/09 +
NCOChaos
50 Windia Dawn Warrior
 
I want to vote for both the 2nd and 3rd options...

also, derp, math fallacies.
Nov 04* +
souibeast
105 Scania Dawn Warrior
 
WOW FAIL LOLOL!

IF a=1 and b=1

THEN YOUR EQUATION WOULD BE

a=a or b=b NOT a=b

because youre using different variables you can't assume a=1 and b=1 until it is solved, so it was obvious frrom the start a =/= b
11/04/09 +
TIMMMEH
124 Bera F/P Arch Mage
 
okay, so a = b, where a = 1.
1 = 1
a + 1 = b + 1 ; 2 = 2
2a = a + 1 ; 2 = 2
2 - 2 = 0
0 = 0
you just proved that 0 = 0
Nov 04* +
MagicTsukai
123 Scania I/L Arch Mage
 
and 1+1 = 3, nerd...
11/04/09 +
 
If a=b then a-b should be 0 so every statement with a-b is negated because you can't divide with zero
11/04/09 +
JamFlan
73 Bellocan Dragon Knight
 
Why are so many people saying that two variables cannot be the same? That is complete nonsense...
11/04/09 +
TheEvilDuck
50 Broa Hunter
 
jimmeh: You cannot divide by 0.


this
11/04/09 +
iPl0x
56 KradiaEMS Crossbow Man
 
jamflan: Why are so many people saying that two variables cannot be the same? That is complete nonsense...


Some people cannot be called mathematicians, if that word exist.
Someone said that a = b is not correct, but it is.

He said if (and only if) a = 1 and b =1
a = b
Which is obviously correct, since a = b
Anyone who denies that, is an idiot.
11/04/09 +
Rezatar
62 Windia Assassin
 
Interesting.
11/04/09 +
iThrowShark
100 Bellocan Thunder Breaker
 
jerryjerry: WOW FAIL LOLOL!

IF a=1 and b=1

THEN YOUR EQUATION WOULD BE

a=a or b=b NOT a=b

because youre using different variables you can't assume a=1 and b=1 until it is solved, so it was obvious frrom the start a =/= b


if youre doing polynomials, you can. and if a = 1 and b = 1 then a = b because 1 = 1
11/04/09 +
JamFlan
73 Bellocan Dragon Knight
 
Satoshi1234: if youre doing polynomials, you can. and if a = 1 and b = 1 then a = b because 1 = 1


It seems that 99% of basilers fail to understand that variables can be equal
profil3 7 Medals
security
11/04/09 +
OhMyWolf
45 Bera Aran in Memory
 
jerryjerry: WOW FAIL LOLOL!

IF a=1 and b=1

THEN YOUR EQUATION WOULD BE

a=a or b=b NOT a=b

because youre using different variables you can't assume a=1 and b=1 until it is solved, so it was obvious frrom the start a =/= b


It's called the transitive property. http://en.wikipedia.org/wiki/Transitive_property
Let a = 1, b = 1:
a = 1 = b
a = b

That's like literally a 6th grade concept.
11/04/09 +
iThrowShark
100 Bellocan Thunder Breaker
 
jamflan: It seems that 99% of basilers fail to understand that variables can be equal


yay for being that 1% lol
11/04/09 +
iPl0x
56 KradiaEMS Crossbow Man
 
Satoshi1234: yay for being that 1% lol


My thoughts EXACTLY xD
11/04/09 +
NLNoFearNL
193 Scania Bishop
 
I can prove 0 = 0 f3

z = a + bi
0 = -z + a + bi
0 = -a - bi + a + bi
0 = 0
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