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Started By
Message
Let’s talk about .9 repeating
Posted on 6/6/26 at 11:16 am
Posted on 6/6/26 at 11:16 am
Do you really believe that it actually equals 1?
I think it comes infinitely close to 1 without equaling 1, TBH.
I think it comes infinitely close to 1 without equaling 1, TBH.
13
Posted on 6/6/26 at 11:18 am to UFFan
No.
Because otherwise we’d all be saying .9 repeating, 2, 3 instead of 1, 2, 3.
Because otherwise we’d all be saying .9 repeating, 2, 3 instead of 1, 2, 3.
Posted on 6/6/26 at 11:21 am to UFFan
quote:
I think it comes infinitely close to 1 without equaling 1, TBH.
Did you just learn about the concept of limits in pre-calculus?
Posted on 6/6/26 at 11:21 am to UFFan
I rate this thread at .9 out of a possible 1,000.
Posted on 6/6/26 at 11:24 am to UFFan
I moved on to 2 already.
Try to keep up.
Try to keep up.
Posted on 6/6/26 at 11:26 am to UFFan
What would you call (1/3)*3?
Posted on 6/6/26 at 11:31 am to UFFan
quote:
Do you really believe that it actually equals 1?
No, but 2+2=5 for extremely high values of 2.
Posted on 6/6/26 at 11:40 am to UFFan
When you prove it out it equals 1.
If x=.99 then 10x=9.99
Subtract the equations.
10x-x=9.99-.99
9x=9
What's x?
1
If x=.99 then 10x=9.99
Subtract the equations.
10x-x=9.99-.99
9x=9
What's x?
1
Posted on 6/6/26 at 12:44 pm to dgnx6
My kingdom for a math major to butt into this thread, but sadly there’s only a thousand exercise science alums.
Posted on 6/6/26 at 12:48 pm to CFDoc
quote:
What would you call (1/3)*3?
To a computer, zero.
Posted on 6/6/26 at 12:51 pm to dgnx6
quote:
If x=.99 then 10x=9.99
Wrong.
If x=.99 then 10x=9.90
9.90-.99=8.91
It doesn’t matter how many repeating 9’s you keep tacking on, there’s also always a zero at the end, because the number of potential digits is infinite, which means .99 repeating can never equal 1.
This post was edited on 6/6/26 at 12:53 pm
Posted on 6/6/26 at 12:53 pm to auggie
quote:
I rate this thread at .9
3.4999999999
Posted on 6/6/26 at 12:54 pm to forkedintheroad
quote:
To a computer, zero.
If you bust out the slide rule, you probably have to round up to 1.
Posted on 6/6/26 at 1:17 pm to BranchDawg
quote:
It doesn’t matter how many repeating 9’s you keep tacking on, there’s also always a zero at the end, because the number of potential digits is infinite, which means .99 repeating can never equal 1.
There is never a 0 at the end. .9 repeating equals 1, period. I don't like the algebraic "proofs" because they aren't really proofs.
I wrote out a simple proof, but Imgur isn't uploading correctly right now. I'll check back later.
Posted on 6/6/26 at 1:38 pm to Everyday Is Saturday
quote:
I moved on to 2 already
Also known as 1+1/2+1/4+1/8+1/16+...
Posted on 6/6/26 at 1:58 pm to UFFan
fractions matter. .0233 of a second difference. 
Posted on 6/6/26 at 1:59 pm to BranchDawg
quote:
It doesn’t matter how many repeating 9’s you keep tacking on, there’s also always a zero at the end, because the number of potential digits is infinite, which means .99 repeating can never equal 1.
There's not a zero at the end if the 9s go on for Infinity
The Taylor series in Kama's post is another great introduction to the true concept of mathematical Infinity
If you stand one foot from a wall and every second take a step halfway toward the wall, how long does it take to reach the wall?
The brain teaser answer is "never", because you are always "only getting halfway there".
But if you truly take an infinite number of steps, it can be proven that the sum of your steps equals the original distance to the wall
Posted on 6/6/26 at 2:00 pm to UFFan
I don't know why I opened this thread, but here I am...
First of all, I was told in no mistakable terms that there would be absolutely no math.
Secondly, the math just isn't mathing, brotato chip.
First of all, I was told in no mistakable terms that there would be absolutely no math.
Secondly, the math just isn't mathing, brotato chip.
This post was edited on 6/6/26 at 2:01 pm
Posted on 6/6/26 at 2:01 pm to UFFan
Yes it =1. It’s proven math. Your opinion does not matter.
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