Does 0.9999(repeating) = 1?

Yes 705 54.95%
No 578 45.05%
Voters: 1283. You may not vote on this poll

Does 0.9999(repeating) = 1?

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Eleshakai

Senior Member

01-23-2013

Quote:
Originally Posted by I*******I View Post
mathemathically is equal

in the real life not

for example: If u have 3 cars and one of these is cutted by half, u have in fact 2.5 cars, not 3

So math and numbers are abtract, u can aproximate everything with maths but you canīt aproximate in real life.
Conversely if I have 3 liters of milk and I pour one of them into 3 little bottles I do in fact still have 3 liters of milk.


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l1lshadow

Senior Member

01-23-2013

Math is a concept which means its possible to show that .9 repeating equals 1 although we know for a fact that two different numbers are in fact separate from each other. It has just been accepted that .9 repeating is equal to 1 because of the proofs.


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Ryster

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Senior Member

01-23-2013

This is a very highly debated concept, even among mathematicians today. It can be proven for both sides that it is true. This is basically which ever one you think it is true. You are never going to use this concept in the real world, so it doesn't matter.

I myself think it equals both, or at least can equal both based on the need. But yea, there will always be people on both sides.


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Roffelos

Member

01-23-2013

u can round it to 1 but 0.9999999.... will never be a full 1


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FairyCharmed

Senior Member

01-23-2013

._. I just voted no and then remembered pre-calc. Damnit... Limits were fun... not :/

So what I really meant was YES, not NO.


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KnightCheckmate

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Senior Member

01-23-2013

.9999(repeating)=1 do to limitations of our comprehension and of mathematics itself.

Simply put using the formula
0.9999.... = X
10 X = 9.999....
(however at this point it is technically 9.999...0, but there is no mathematical way to express an infinite number that is no longer infinite so based on limitations it breaks down to not being possible to have a zero at the end of an infinite string and thus allowing the proof to continue as such)
10X - X = 9
9X = 9
9X / 9 = 1
So, X = 1


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Mechwarrior5

Senior Member

01-23-2013

Quote:
Originally Posted by I*******I View Post
mathemathically is equal

in the real life not

for example: If u have 3 cars and one of these is cutted by half, u have in fact 2.5 cars, not 3

So math and numbers are abtract, u can aproximate everything with maths but you canīt aproximate in real life.
That's rounding, it has absolutely nothing to do with the 0.999 = 1 subject.


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Genspirit

Senior Member

01-23-2013

mathematically yes logically no


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leetnanas

Senior Member

01-23-2013

Quote:
Originally Posted by Kazral View Post
So you effectively just said "Mathematically it is true, but it doesn't *feel* right to me so it isn't." Since when do feelings take priority over proper math?
Again, you're looking at it from a math perspective. (I have a feeling GD's logic wont be able to follow what I'm about to say... but here goes.)

Lets say we looked at it from an Artistic stand point.

If someone Painted a 1 on a canvas

And someone Painted a .9999999 on a canvas

And this was prehistoric times and no one understood math... would the painting be the same?

Of course it wouldn't. It would be different. One would show a 1, one would show a .99999

Open your minds and think outside the box.


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Limited Reactant

Senior Member

01-23-2013

How are there this many people who don't understand basic math?