The Instigator
t-man
Pro (for)
Tied
0 Points
The Contender
sigerz
Con (against)
Tied
0 Points

1 is equal to .999...

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Post Voting Period
The voting period for this debate has ended.
after 0 votes the winner is...
It's a Tie!
Voting Style: Open Point System: 7 Point
Started: 9/18/2011 Category: Miscellaneous
Updated: 5 years ago Status: Post Voting Period
Viewed: 551 times Debate No: 18373
Debate Rounds (5)
Comments (1)
Votes (0)

 

t-man

Pro

1 is equal to .999...
or
1=.999...

===Rules===

No semantics.

First round is for acceptance.

Only rebuttals 5th round.

I ask my opponent to accept the basic laws of math as true (ex:Additive Property of Equality).

In .999... the 9's go on forever.
sigerz

Con

if 1=.999.... then 2 also =1.999. I�m saying that 1 is number, .999... is a different number and in math 1=1 not .999...
Debate Round No. 1
t-man

Pro

===Rebbutal===

"if 1=.999.... then 2 also =1.999."
What does that prove?

"I´m saying that 1 is number, .999... is a different number"
I'm saying that they are the same number.

"and in math 1=1 not .999..."
1=1 and 1=.999.... You still haven't proved that they don't.

===Proof===

1. x=.99999999...

2. 10x=9.99999999...

3. 10x-x=9.99999999...-.99999999...

4. 9x=9

5. x=1

6. 1=.99999999...

===Explanation of Proof===

1. This establishes a variable x equal to .99999999...

2. Multiplying both sides by 10

3. Because x=.99999999... I can subtract one side by x and the other by .99999999... and have a valid equation

4. 10x-x=9x and 9.99999999...-.99999999...=9

5. Dividing both sides by 9

6. They both equal x and therefore equal each other

============================================

Vote Pro!



sigerz

Con

sigerz forfeited this round.
Debate Round No. 2
t-man

Pro

Con has forfeited. Vote Pro!
sigerz

Con

sigerz forfeited this round.
Debate Round No. 3
t-man

Pro

Vote Pro!
sigerz

Con

sigerz forfeited this round.
Debate Round No. 4
t-man

Pro

Vote Pro!
sigerz

Con

I give up. you win
Debate Round No. 5
1 comment has been posted on this debate.
Posted by Grape 5 years ago
Grape
"if 1=.999.... then 2 also =1.999"

thanks?
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