User since: Nov 21, 2000 at 15:07 UTC (20 years ago) Last here: Jun 24, 2009 at 14:35 UTC (12 years ago) Experience: 1468 Level: Hermit (10) Writeups: 164 Location: London User's localtime: Jan 15, 2021 at 13:37 -11 Scratchpad: View For this user: Search nodes

Well its me init, I am a unix / C / C++ /Java / Perl / Stuff programmer. I code stuff to do stuff, that is about as specific as it gets.

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# 0/0 Does not equal 1

WORD
```1)     x = y
2)     x^2 = xy      (multiply both sides by x)
3)     x^2 - y^2 = xy - y^2  (subtract y^2 from each side)
4)     (x + y)(x - y) = y(x - y)     (factor)
5)     x + y = y     (divide out (x - y))
6)     2y = y      (substitute y for x from #1)
7)     2 = 1      (What do you think of that?!)
```
The mistake comes in step 5, when dividing by (x-y) on both sidesand the equation becomes (X+Y)* 0/0 = Y * (0/0) iff 0/0 == 1 then the result would be valid and 2 would in fact be equal to 1... this could make maths a little tricky.