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Q&A #267


An algebraic "proof" that 2 = 1

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Description:  A false "proof" (for 2 = 1 ) which also shows that what you think is so, isn't necessarily so.
Level:  Middle School (6-8), High School (9-12)
Math topic:  Algebra
Ed. topic:  Special Contexts, Adult Education

Original Question/Response
04 Apr 98   Algebra proof by Doug High
13 May 98   Re: Algebra proof by Claudia
14 May 98   Re: Algebra proof by Doug High

Public Discussion
25 Jun 98   Here is a similar "proof" by Gregory Pack
28 Feb 03        Expansion on Diltert by Matt
25 May 05        Re: Here is a similar by Alex
18 Nov 03   Another fun proof that shows 2 = 1 by Mr. Leohr
23 Feb 03        Re: An algebraic "proof" that 2 = 1; division by zero by Loyd
18 Nov 03            Re: Re: An algebraic by n21jc

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