en.wikipedia.org/wiki/Mathematical_fallacy

In mathematics, certain kinds of mistaken **proof** are often exhibited, and
sometimes collected, ... **1** Howlers; 2 Division by zero; **3** Multivalued functions; 4
Calculus; 5 Power and root. 5.1 Positive and negative roots; 5.2 Squaring both
sides of an ...

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** ...

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

Mathematically you can't, because that would mean that maths is broken. All the answers will be some sort of false proofs which sometimes maybe hard to spot .

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

Nov 27, 2014 **...** I have a mathematical **proof** for you: Start with the following simple equation: a=b
a = b. (step **1**) Multiply both sides by b b : ab=b2 a b = b 2.

brilliant.org/discussions/thread/proof-that-1-1-and-1-3

**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.

answers.yahoo.com/question/index?qid=20090801020846AAyCpa1

**1** = **1** 41 – 40 = 61 – 60 16 + 25 – 40 = 36 + 25 – 60 4² + 5² – 2 * 4 * 5 = 6² + 5² – 2
* 6 * 5 (4 – 5)² = (6 – 5)² 4 – 5 = 6 – 5 4 = 6 2 = **3 1** + **1** = **3**

www.homeschoolmath.net/teaching/zero-exponent-proof.php

**Proof** that (-**3**)^{0} = **1**. How to prove that a number to the zero power is one. Why is
(-**3**)^{0} = **1**? How is that proved? Just like in the lesson about negative and zero ...

www.purplemath.com/modules/howcan1.htm

being equal to ^{1}/**3**, but then, one-third is a fraction. Maybe ... **1**. Note: Technically,
the above **proof** requires that some fairly advanced concepts be taken on faith.