Poll: Does 0.99 Recurring = 1

Does 0.99 Recurring = 1

  • Yes

    Votes: 225 42.5%
  • No

    Votes: 304 57.5%

  • Total voters
    529
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Originally posted by AlphaNumeric
I think you mean "They'll give an explaination I won't understand and therefore will ignore" don't you?

no i mean they cant explain it,

You right .9r out for 10million years have the fastest computer typr .9r out for 10million years it still want =1

Cabnt u see what im getting at???
 
Originally posted by Gilly
I thought that we were all in agreement that infinity is no more than an abstraction. A convenience rather than a quantifiable number. This wasn't contested in the other thread. Did you miss it or change your mind?
Infinity yes, 0.9r? No, thats a number.
 
Originally posted by Guv
x=0.999999r
10x=9.999999r
9x=9
x=1


Therefore 0.9r = 1

That's just been engineered wrongly to say that 0.9r = 1

Looking at the second line, 10x=9.9999r, don't forget that in algebra you can't just subtract from each side and still keep them equal, so to say that just because 10x=9.9r then 9x=9 is WRONG. For the statement to be true, you would have to divide each side on the second line by ten, and then multiply by 9

eg.
10x/10 = 1x
and 9.9r/10 = 0.9r

So that means x = 0.9r

The third line: 1x * 9 = 9x
and 0.9r * 9 = 8.9r

So 9x = 8.9r

THERE IS NO LINK BETWEEN THE SECOND AND THIRD LINES - Between the second and third line, the creater of the quoted "proof that 0.9r = 1" has cheated algebra becasue between those lines, the X suddenly changes from being an unknown value to holding the value 1 when there is nothing to prove it.

By now I hope you all realise that this "proof" is not proper maths. :cool:
 
Originally posted by AcidHell2
ok i now it hard to see but can you not cope with the possability of efinity??? it never ends so you can never pick a number. Hence why the maths model just ignores it and says it = 1. If you didnt have that round up maths would fall over.
It is not a round-up! If there is nothing between number A and number B, number a is equal to number B!

The same way there is nothing between 2*2 and 4: 2*2=4!

It is you who isn't grasping things here!
 
Yes, they are equal. Thankfully for all you people, the maths your everyday life depends on accepts this fact, so you can sleep at night without your alarm clock attacking you, or such.
 
Originally posted by AcidHell2
no i mean they cant explain it,

You right .9r out for 10million years have the fastest computer typr .9r out for 10million years it still want =1

Cabnt u see what im getting at???
Yes, and you've been thinking in physical terms, which (for the 35.4 millionth time) has nothing to do with maths. The cubic root of 3 doesn't exist in the real world, but its still a number, because in maths, you don't worry about what exists in physics or not.

Can you see what I'm getting at?
 
Originally posted by Gilly
I thought that we were all in agreement that infinity is no more than an abstraction. A convenience rather than a quantifiable number. This wasn't contested in the other thread. Did you miss it or change your mind?
Hmmm - looked like we were talking about 0.9r to me:
Originally posted by Gilly
I thought we'd all agreed that 0.9r isn't a number?

4 and 3 both are.
Not 'infinity' as a number.

:p :rolleyes: :D
 
Originally posted by piggott
That's just been engineered wrongly to say that 0.9r = 1

Looking at the second line, 10x=9.9999r, don't forget that in algebra you can't just subtract from each side and still keep them equal, so to say that just because 10x=9.9r then 9x=9 is WRONG. For the statement to be true, you would have to divide each side on the second line by ten, and then multiply by 9

eg.
10x/10 = 1x
and 9.9r/10 = 0.9r

So that means x = 0.9r

The third line: 1x * 9 = 9x
and 0.9r * 9 = 8.9r

So 9x = 8.9r

THERE IS NO LINK BETWEEN THE SECOND AND THIRD LINES - Between the second and third line, the creater of the quoted "proof that 0.9r = 1" has cheated algebra becasue between those lines, the X suddenly changes from being an unknown value to holding the value 1 when there is nothing to prove it.

By now I hope you all realise that this "proof" is not proper maths. :cool:

lmao
 
Originally posted by VDO
It is not a round-up! If there is nothing between number A and number B, number a is equal to number B!

The same way there is nothing between 2*2 and 4: 2*2=4!

It is you who isn't grasping things here!

no you are not grasping things here. Just cos theres no number between the to numbers doesnt mean there the same.

This is where infinity is so mind bogolling. you cant come up with a number cos the .9 never ends but you now there is a number that can be added to it to make 1
 
Originally posted by AcidHell2
no i mean they cant explain it,

You right .9r out for 10million years have the fastest computer typr .9r out for 10million years it still want =1

Cabnt u see what im getting at???
The same way, no matter how many times you type "4/4" into Microsoft Word, you won't see "1".
 
Originally posted by w11tho
I was suprised you didn't see why there wouldn't exist any shorthand. But ho-hum, guess it wasn't quite as obvious a contradiction as I thought.

:o

Well in the same way that in reality, we can't have an infinite number of zeroes after a decimal point with a one on 'the end' of those, we can't have an infinite number of nines after a decimal point. The thing that lets down both concepts is the inclusion of infinity. It only exists in the abstract.
 
Originally posted by piggott
By now I hope you all realise that this "proof" is not proper maths. :cool:
And I hope you realise you have no idea about mathematical operations :)
Originally posted by AcidHell2
no you are not grasping things here. Just cos theres no number between the to numbers doesnt mean there the same.
Yes it does. Its another fundamental maths result.
 
ok.. stopped laughing now.

right, let x = 0.99r
10x = 9.99r

with me so far?

now as x = 0.9999999.... (continue forever)
and 10x = 9.9999999.... (continue forever)

simply subtract the (.999999...) part from 9.999999...

and you get 9.

what is difficult about that?
 
Originally posted by AcidHell2
no you are not grasping things here. Just cos theres no number between the to numbers doesnt mean there the same.

This is where infinity is so mind bogolling. you cant come up with a number cos the .9 never ends but you now there is a number that can be added to it to make 1
Please, please tell me oh guru, what number is added to 0.9r to make it 1? If there is nothing between two numbers, why can they not be equal to each other?
 
Originally posted by piggott
That's just been engineered wrongly to say that 0.9r = 1

Looking at the second line, 10x=9.9999r, don't forget that in algebra you can't just subtract from each side and still keep them equal, so to say that just because 10x=9.9r then 9x=9 is WRONG. For the statement to be true, you would have to divide each side on the second line by ten, and then multiply by 9

eg.
10x/10 = 1x
and 9.9r/10 = 0.9r

So that means x = 0.9r

The third line: 1x * 9 = 9x
and 0.9r * 9 = 8.9r

So 9x = 8.9r

THERE IS NO LINK BETWEEN THE SECOND AND THIRD LINES - Between the second and third line, the creater of the quoted "proof that 0.9r = 1" has cheated algebra becasue between those lines, the X suddenly changes from being an unknown value to holding the value 1 when there is nothing to prove it.

By now I hope you all realise that this "proof" is not proper maths. :cool:
 
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