Did You Know That… 2=1?
November 18, 2008
No, this is not a commercial of any kind (trying to convince you that if you buy 1 you will get 2)! This is just a mathematical proof that 2=1. I remember that my math teacher in high school first showed me this. I was quite impressed! A few days ago I randomly encountered the proof and recalled it. Here it is:
X = Y X*X = Y*X ; Multiply by X X*XY*Y = Y*XY*Y ; Subtract Y*Y from both sides (XY)*(X+Y) = Y*(XY) ; Some standard conversions X+Y = Y ; Cancel out (XY) 2*X = X ; Use that X = Y 2 = 1 ; Divide both sides by X
Are you convinced now? π
Latest posts by Valentin (see all)
 The Mathemagician on Why Math Matters (and Other Cool Ideas)  January 29, 2010
 Did You Know That… 2=1?  November 18, 2008
 Pushing Kids From an Early Age?  September 24, 2008

Sam

Valentin

Sam