0.9999 repeating is equal to 1 - and i can prove it

Sort:
Avatar of bredmanz
Guys 1/3 is equal to 0.3333 repeating (put it into ur calculator), and 1/3 multiplied by 3 is 3/3 (which is 1). Now 0.333 repeating (which is 1/3) multiplied by 3 is 0.9999 repeating. that means 0.9999 repeating is equal to 3/3 (which is 1).
Avatar of Knight_king1014

Your proof is wrong. 1/3 isn't exactly equal to 0.333 repeating. It's 1/3 ≈ 0.333 repeating. This is why we get 0.9999 repeating instead of 1.

Avatar of Raphael

0.9999999999....=x 

9.9999999999....=10x 

_________________________---- 

9=9x 

1=x 

That's how i prove it

Avatar of Knight_king1014

How did you get to 9 = 9x?

Avatar of Raphael

I subtract it

Avatar of Knight_king1014

So you subtract 0.999999999 repeating. Ok but you are proving that 0.999999 repeating = 1. You can't use what you're proving in the proof.

Avatar of Knight_king1014

That makes the proof not valid and therefore you're not right.

Avatar of 132J

No, he is correct. His math is right.  

Avatar of Knight_king1014

You can't use what you're trying to prove in the proof itself.

Avatar of Knight_king1014

I'll explain. He's trying to prove 0.999 repeating is equal to 1. When he subtracts that from both sides he can't say that 10 - 0.999 repeating is equal to 9 because that hasn't been proven yet.

Avatar of Knight_king1014

Therefore the proof is not valid.

Avatar of bredmanz
my proof is valid knightking. your reasoning for why i was wrong is what i literally said in the post. read my post and your first post again
Avatar of czechsalmon
0.999… x 2 = 1.888888…

1 x 2 = 2

2>1.888888…

;)
Avatar of Aeacb_7221
If you want to be more exact, you don't round 0.9 with a repeating 9 to 1.
Avatar of Raphael
Knight_king1014 wrote:

So you subtract 0.999999999 repeating. Ok but you are proving that 0.999999 repeating = 1. You can't use what you're proving in the proof.

Well let me explain 

Lets assume that 0.9999...=x 

Then we multiply each side(i mean the 0.9999... and x) by ten 

Then we got 9.9999...=10x 

After that we subtract 9.9999...=10x and 0.9999...=x 

Then we got 9=9x 

Then divide 9 and 9x by nine 

There we go, we got 1=x

Avatar of MxC2031
bredmanz wrote:
my proof is valid knightking. your reasoning for why i was wrong is what i literally said in the post. read my post and your first post again

Um your proof is not valid at all lol. 1/3 is approximately 0.33333 not equalt to 0.333333 knightking is right. :/

Avatar of Intellectual_26

No matter how great we allow n to be, and how many times you put down 9's

(10^n)-1 shall not dissolve into 10^n

Hope this helps.

Avatar of Knight_king1014

Thank you MxC2031

Avatar of Knight_king1014

And you marshall I guess

Avatar of Raphael
Knight_king1014 wrote:

That makes the proof not valid and therefore you're not right.

Uno reverse card 

You are wrong knight kid 

Whoops i mean @Knight_king1014