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1 = 2 anyone?

Anyone know any decent proofs for 1 = 2?

I'd especially like to see some without dividing by 0, or if anyone knows any using cyclical functions would be good - I'm sad and spend my time finding such proofs.

Put down any you know anyway!

Cheers guys!

Reply 1

Saiyan

Master Gee

Anyone know any decent proofs for 1 = 2?

I'd especially like to see some without dividing by 0, or if anyone knows any using cyclical functions would be good - I'm sad and spend my time finding such proofs.

Put down any you know anyway!

Cheers guys!

suppose x = 1
then x ² - 1 = x - 1
factorising gets you (x + 1) (x - 1) = (x - 1)

Divide both side by (x-1)
you get (x+1) = 1

put back x = 1

and you get 2 = 1

=)

Reply 2

idiopathic

15

Master Gee

Anyone know any decent proofs for 1 = 2?

I'd especially like to see some without dividing by 0, or if anyone knows any using cyclical functions would be good - I'm sad and spend my time finding such proofs.

Put down any you know anyway!

Cheers guys!

1=a
let a=2
1=2

How can you have proof for something that's not true :stupido3:

Reply 3

El Stevo

11

Saiyan

Divide both side by (x-1)

bogus! :thumpdown: you *cant* divide by 0

Reply 4

Master Gee

OP

endeavour

1=a
let a=2
1=2

How can you have proof for something that's not true :stupido3:

With cunning and deception!

Obviously you can't, but it's a laugh trying. Prooving that 1 = 2 kind of negates the universe because it means all numbers equal each other so everything dies.

Most of the proofs revolve around 0 and it's lack of definition - division by 0, powers of 0, 0 to a power etc. There's other ones too such as using set theory or cyclical function as I said above.

Reply 5

idiopathic

15

http://mcraefamily.com/MathHelp/JokeProofLog2Zero.htm

Reply 6

Freeway

imagine a series x+x+x+x+x+x+x+x...+x
differentiated u get 1+1+1+1+...1
ok, now say you have x 1's
which is x
that means you would x x's
which is x^2
differentiated you get 2x
so the answer is x and 2x
regardless of the value of x
therefore 1=2

Reply 7

Master Gee

OP

endeavour

http://mcraefamily.com/MathHelp/JokeProofLog2Zero.htm

pretty damn good, although if you know how it works could you explain how it goes from the third to the fourth line.

the - 2(1/2 + 1/4 +...) going to -(1 + 1/2 + 1/3 + ...) is what i don't get

Cheers

Reply 8

Master Gee

OP

Freeway

imagine a series x+x+x+x+x+x+x+x...+x
differentiated u get 1+1+1+1+...1
ok, now say you have x 1's
which is x
that means you would x x's
which is x^2
differentiated you get 2x
so the answer is x and 2x
regardless of the value of x
therefore 1=2

that one's a good un too, although it only works for positive integers and there's another reason why it's wrong too... I've forgotten it though

Reply 9

JamesF

1

Master Gee

pretty damn good, although if you know how it works could you explain how it goes from the third to the fourth line.

the - 2(1/2 + 1/4 +...) going to -(1 + 1/2 + 1/3 + ...) is what i don't get

Cheers

2(1/2 + 1/4 +...) = 2/2 + 2/4 + 2/6 + 2/8 ... = 1 + 1/2 + 1/3 + 1/4 ...

Reply 10

manps

endeavour

1=a
let a=2
1=2

How can you have proof for something that's not true :stupido3:

lol

Reply 11

JamesF

1

If you wanted to know, the log 2 one is false because the series is not absolutely convergent, and the series one is because the function is not continuous.

Reply 12

Master Gee

OP

JamesF

2(1/2 + 1/4 +...) = 2/2 + 2/4 + 2/6 + 2/8 ... = 1 + 1/2 + 1/3 + 1/4 ...

cough... that's embarassing

cheers

Reply 13

Saiyan

El Chueco

bogus! :thumpdown: you *cant* divide by 0

-____-" lol... thanks for pointing that out for me =)

Reply 14

CharlC

Hmm i did have a 1=9 written down somewhere but i've lost it. Had loads of trig in it, but wasn't technically quite right! Does anyone know it??

Reply 15

samd

10

http://www.magicmaths.tk

The one on the left is fairly rubbish, but the one on the right is a little better.

Reply 16

Zuber

6

a = b
times both sides by b
ab = b²
minus a²
ab – a² = b² – a²
factorise
a(b-a) = (b+a)(b-a)
divide by (b-a)
a = b+a
replace b by a
a = a + a
a = 2a
divide by a
1 = 2

1 = 2 anyone?

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