amazing prooff of 1=2 (1 Viewer)

[Dumbarse]

Let

a=b

multiply both sides by b

ab = b^2

minus a^2 from both sides

ab-a^2 = b^2 - a^2

factorise

a(b-a) = (b-a)(b+a)

divide both sides by (b-a)

a= b+a

BUT a=b

a = 2a

divide through by a

1 = 2

 

[SarahMary]

this is like the 1/2 empty=1/2 full, and study=fail thing

 

[Xayma]

Ok two problems with that.

Apart from the obvious dividing through by 0 in (b-a) you never specified that a≠0, b≠0

 

[Dumbarse]

(b-a) is not always 0

 

[Xayma]

But a=b.

∴ b-a=0 If you give me a valid counterexample then I might agree.

 

[Dumbarse]

counter examples are a plenty
wait till uni
you'll drown in such counter examples

 

[mojako]

this dividing by zero thing is becoming a cliche...
there are other stuff which I think is more interesting
http://www.boredofstudies.org/community/showthread.php?t=42425&page=3&pp=15
http://www.boredofstudies.org/community/showthread.php?t=42425&page=4&pp=15

 

[withoutaface]

Nice thread

 

[mr EaZy]

Nice thread

i agree although i thought XAyma nearly had him there

 

[Slidey]

counter examples are a plenty
wait till uni
you'll drown in such counter examples

INCORRECT. NO MATTER HOW HARD MATHS GETS, 1 IS ALWAYS 1, AND 2 IS NEVER 1, AND THAT WHICH HAS BEEN RIGOUROUSLY AND FORMALLY PROVED WILL REMAIN PROVED FOREVER.

Unless you like change the Peano Postulates or something, in which case you aren't producing a contradiction, but just an answer under a different set of axioms.

Exempli gratia: the change of the fifth axiom in Euclidean geometry, which leads to non-Euclidean geometries, such as those which match the fabric of space.

 

[withoutaface]

Thread closed because it is dumb.