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## Mathematical fallacy

en.wikipedia.org/wiki/Mathematical_fallacy

In mathematics, certain kinds of mistaken proof are often exhibited, and sometimes collected, ... The following example uses division by zero to "prove" that 2 = 1 , but can be modified .....

## Proving that 1 + 1 = 3 - Math Forum - Ask Dr. Math

mathforum.org/library/drmath/view/56734.html

Date: 11/19/95 at 17:12:23 From: Doctor Ken Subject: Re: 1+1 = 3 ? Hello! Let me say first of all that there is no real proof for the statement 1 + 1 ...

## How to prove that 1+1 = 3 - Quora

www.quora.com/How-can-you-prove-that-1 1-3

Now since a=b (the starting point of this proof), we can write this as: a+1=a+a+1 ... Interchange the symbol of 2 by the symbol of 3, then 1+1=3. But, if you have a ...

## riddle - When does 1+1=3? - Puzzling Stack Exchange

puzzling.stackexchange.com/questions/5656/when-does-11-3

edited Nov 28 '14 at 16:40 · warspyking. 5,78123095. asked Nov 27 '14 at 19:04. josh. 7113 ... I have a mathematical proof for you: Start with the following ...

Nov 26, 2010 ... In this video, I prove how 1 + 1 = 3 Meaning that 2 = 3 I used simple algebra to prove this. If you can find ANY errors in my calculations, please ...
Nov 3, 2008 ... a silly calculator that shows 1+1=3. ... he did 1+0 and then he did +1+1 so 1+0+1 +1=3﻿. Read more. Show less. 1. TiAnCal7 years ago. How did ...

## Induction Proofs: Examples of where induction fails - Purplemath

www.purplemath.com/modules/inductn2.htm

Let n = 1. Then n<sup>3</sup> = 1<sup>3</sup> = 1 and n<sup>2</sup> = 1<sup>2</sup> = 1, and 1 < 1. Then (*) holds for n = 1. Hmm...that's ... And that's where the induction proof fails in this case. You can't ...

## Classic Fallacies -- 1=2: A Proof using Complex Numbers

www.math.toronto.edu/mathnet/falseProofs/second1eq2.html

May 26, 1998 ... (IMAGE) Go backward to 1=2: A Proof using Beginning Algebra ... Step 7: i (i/2 + 3/(2i) ) = i ( 1/(2i) + 3/(2i) ), ... This proof uses complex numbers.

## Science Jokes:1. MATHEMATICS : 1.1 PROOFS

jcdverha.home.xs4all.nl/scijokes/1_1.html

Fodor: My argument for p is based on three premises: (1) q (2) r and (3) p >From .... From: jreimer#NoSpam.aol.com (JReimer) Theorem: 1 = -1 Proof: 1 = sqrt(1) ...

## Prove that 1- 1 2 1- 1 3 1- 1 4 . . . 1- 1 n

www.coursehero.com/file/p738ljv/EXAMPLE-4-Prove-that-1-1-2-1-1-3-1-1-4-1-1-n-1-n-for-any-integer-n-2-Proof-STEP/

EXAMPLE 4 : Prove that 1- 1 2 1- 1 3 1- 1 4 . . . 1- 1 n = 1 n ( * ) for any integer n 2 . Proof : from MATH UA 125 at NYU.

### Math Forum: Ask Dr. Math FAQ: False Proofs and Classic Fallacies

mathforum.org

What's wrong with proofs that say 1+1=1 or 2=1? ... Here's one from the Dr. Math archives: "Proof" that 1 + 1 = 1. a = 1 b = 1. a = b a<sup>2</sup> = b ... 4 - 6 + 9/4 = 1 - 3 + 9/4

### Proof that -1 = 1 and 1 = 3 - Calvin Lin | Brilliant

brilliant.org

Proof that -1 = 1 and 1 = 3. This image was sourced and then altered from the NASA image archive. The chimpanzee pictured was named Ham the Astrochimp.

### 1/2 + 1/3 - Simon Singh

www.simonsingh.net

Apr 25, 2015 ... Paradox: 11/2 + 1/31/4 + . ... but there is a neat proof that shows that the sum is infinite. in fact, the proof is super neat and well worth a look.