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## #1 Re: This is Cool » 2011 New Year - New Way of Looking at Infinite-Recurring 0.9 » 2011-01-26 03:05:03

"THE ROOT IS WHAT YOU THINK! Infinite-Recurring 0.9 Is"

so, the root is what i think infinite recurring 0.9 is?

i think infinite recurring 0.9 = 1, so the root is 1?

what does that have to do with anything?

and why do you have to use random terminology that has nothing to do with your argument?

here is what you have done:

1) conjecture that 0.999... is NOT 1 despite there being lots of proofs that it IS 1
2) give an extremely vague description of your argument
3) when asked to elaborate on your argument, you just repeat yourself and insult them

so what you have actually done is annoyed some people and done nothing good to get your point across.

can you also explain what you find wrong with my proof?

let x = 0.999...

10x = 9.999...

9x = 9
therefore x = 1 = 0.999...

## #2 Re: This is Cool » 2011 New Year - New Way of Looking at Infinite-Recurring 0.9 » 2011-01-26 02:50:28

well, i am interested in seeing if he can provide a good argument, at least....

## #3 Re: This is Cool » Is It Possible To Calculate The End of The Earth's Existence!? » 2011-01-26 02:44:43

How many times do you have to be Proved wrong! before you Admit to yourself you are up against a far more Intelligent...Higher...Being.

is there any need for this?

## #4 Re: This is Cool » Is It Possible To Calculate The End of The Earth's Existence!? » 2011-01-26 02:43:39

i'm sorry, but if we know nothing can you explain what it means then?

## #5 Re: This is Cool » 2011 New Year - New Way of Looking at Infinite-Recurring 0.9 » 2011-01-26 02:37:28

100 Root = 100?

by root you mean...the origin? ok, what does this have to do with the original problem?

you are telling us something about 0.999... and something about understanding the root but you are being very vague still

## #6 Re: Help Me ! » teaching euler characteristic of a plane » 2011-01-26 02:15:47

hello bob bundy, thank you so much for your help!

they are 15-16 years old.

## #7 Re: This is Cool » 2011 New Year - New Way of Looking at Infinite-Recurring 0.9 » 2011-01-26 01:41:21

hi, can you explain what you mean?

we have proven that 0.999... = 1

you also want us to prove -0.999... = -1?

let x = -0.999...

10x = -9.999...

9x = -9

x = -1

so now -0.999... = -1

what do you mean by root? square root?

well i have just proven that 0.999... = 1 so if both are the same then square root of both should surely be the same?

also what is "IR0.9N( ? )  IR0.9R( ? )  IR0.9P( ? )"

## #8 Re: Introductions » Hello Fellow Smart Ones! » 2011-01-26 01:14:45

hello, nice to meet you! all i can say is, learn as much as you can but also have fun, use khanacademy, examsolutions etc and as many youtube videos as you can, read books, find good math teachers, use mathisfun and physicsforums and WA to learn. when you dont understand just ask someone, other people never have this kind of thing when they were young, make the most of it

## #9 Re: Ganesh's Puzzles » 10 second questions » 2011-01-26 01:09:15

how i can do this in 10 seconds? its nice problems but i am too slow..

## #10 Help Me ! » teaching euler characteristic of a plane » 2011-01-26 01:05:44

dolgopolov
Replies: 8

hello guys and girls,

first of all forgive my english.

i am wanting to teach euler characteristic of a plane in a really fun way to get the kids to discover the identity for themselves.

i thought about getting the students to use paper to draw different shapes in 2D and note different things about them. or should i just say straight out to note down the vertices, the number of edges, etc?

for 3D, i can use those colorful polygon connector things and do the same, no?

what is the best way to teach this in a way that the kids will not find boring?

thank you!

## #11 Re: This is Cool » 2011 New Year - New Way of Looking at Infinite-Recurring 0.9 » 2011-01-26 01:01:40

thanks!

also if you google some of his usernames you can see he post the same thing on lots of other math forum

## #12 Re: This is Cool » Is It Possible To Calculate The End of The Earth's Existence!? » 2011-01-26 00:57:07

if you are talking about if a computer or a human is better..

what do you mean by better?

if a computer play the best players in the world and win every time, then that mean it can win all the time.

but what a human can do that a computer cant i would say is make up new defences, attacking methods, etc, a computer cant (usually) do this. a human has the creative mind

also the world will end if and only if the world doesn't end  tomorrow

## #13 Re: This is Cool » 2011 New Year - New Way of Looking at Infinite-Recurring 0.9 » 2011-01-26 00:52:24

hi bobbym, I visit this forum sometimes just to look at whats being talked about! and it looks like it is the same guy because he always talks about silly things (like 0.999 not being 1, proving FLT, etc)

## #14 Re: This is Cool » Is It Possible To Calculate The End of The Earth's Existence!? » 2011-01-26 00:43:02

can somebody explain to me what the argument is here ? are you talking about the end of the earth or about chess ?

## #15 Re: This is Cool » 2011 New Year - New Way of Looking at Infinite-Recurring 0.9 » 2011-01-26 00:38:54

http://mathisfunforum.com/profile.php?id=90430
http://mathisfunforum.com/profile.php?id=38924
http://mathisfunforum.com/profile.php?id=37599
http://mathisfunforum.com/profile.php?id=5702
http://mathisfunforum.com/profile.php?id=38724

aren't these all you?

## #16 Re: This is Cool » 2011 New Year - New Way of Looking at Infinite-Recurring 0.9 » 2011-01-26 00:31:25

Hi ARB,

Let x = 0.999...

10x = 9.999...

9x = 9

x = 1

But wait! We let x = 0.999...

Therefore 0.999... = 1.

What is the problem with this proof? Which line contains the error?

Also weren't you banned before? (for trolling or insulting or something, i read the old thread)