Math Is Fun Forum

Exist

Novice

From: BAD APPLE!!!

Registered: Yesterday

Posts: 2

A lovely question

How to prove:1+1=3

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I saw,green Lambert mars,like harvest.800 years run,like exnjdddddddd

Jai Ganesh

Administrator

Registered: 2005-06-28

Posts: 51,261

Re: A lovely question

How can you prove something that is not true?

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It appears to me that if one wants to make progress in mathematics, one should study the masters and not the pupils. - Niels Henrik Abel.

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Bob

Administrator

Registered: 2010-06-20

Posts: 10,788

Re: A lovely question

hi Exist,

Welcome to the forum.

I need another proof first; then, it's easy!

Let a = b

then

Factorise:

Cancel the common factor (a-b)

Now to tackle your question:

Let a = b = 1 then

1 + 1 = 1

But 1 + 1 = 2           =>        1 = 2

Now add 1 to each side

1 + 1 = 2 + 1 = 3                   QED.   

He then went on to prove that black = white and got run over crossing the road on a black/white crossing!

Bob

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Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you!  …………….Bob