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A flawed proof? (Posted on 2002-12-20) Difficulty: 2 of 5
Given: a=b. Applying some basic identity transformations, we get:
       a=b
       a^2-ab=a^2-b^2
       a(a-b)=(a+b)(a-b)
       a=a+b
       a=a+a
       a=2a
       1=2
With such a proof, we can show that 1=2, pi=E, 10000000000000=1, etc.... Can you spot the flaw?

See The Solution Submitted by phil    
Rating: 2.9167 (12 votes)

Comments: ( You must be logged in to post comments.)
  Subject Author Date
SolutionSolution To The ProblemK Sengupta2007-03-20 12:24:44
iseeit.dorkdork2003-08-02 22:09:49
SolutionSolutionrajesh2003-06-30 21:11:55
No nomichael2003-04-12 04:31:45
Not reallyGamer2003-04-11 09:52:01
No SubjectN__A__T__A2003-01-03 07:42:18
Solution1st post, correct solution (i think)Aim Jayy2002-12-25 22:11:06
SolutionSolutionJen2002-12-25 10:51:33
SolutionGautam Joshi2002-12-23 14:18:27
solutionananth2002-12-21 17:10:22
re(2): A flawed proof? ( Solution )Ravi Raja2002-12-21 07:21:16
re: A flawed proof? ( Solution )Dulanjana2002-12-21 05:56:58
A flawed proof? ( Solution )Ravi Raja2002-12-20 19:14:19
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