.9 Repeating = 1 YES -or- NO


Does .9 Repeating equal to 1?  

116 members have voted

You do not have permission to vote in this poll, or see the poll results. Please sign in or register to vote in this poll.

Recommended Posts

ericnkatz

I say Yes, 2 Students in the same class say No.

Must Solve This Problem

[Kinda Dorky Gay problem.. But w/e]

Thanks,

Proxy

Link to post
Share on other sites
Dazzla

x = 0.9999...

10x = 9.9999...

10x - x = 9x

9.9999... - 0.9999... = 9

9 = 9x

1 = x = 0.9999...

Link to post
Share on other sites
ericnkatz

Yeh Thats what im thinking too Dazzla

Link to post
Share on other sites
Malechai
x = 0.9999...

10x = 9.9999...

10x - x = 9x

9.9999... - 0.9999... = 9

9 = 9x

1 = x = 0.9999...

whoa dudes got skills!!

Link to post
Share on other sites
un4given1

No. it equals .99999... if you round it then yes.

Link to post
Share on other sites
OPaul

I say no.

.9999... = .9999...

1 = 1

.9999... is a none real number, 1 is a real number.

.9999... never reaches 1, it just gets closer and closer indefinitely.

Link to post
Share on other sites
Bubbo

Another proof that it does equal 1:

0.111... = 1/9

0.111...*9 = 0.999...

since 0.111.... = 1/9 -> 1/9 * 9 = 0.999...

1/9 * 9 = 9/9 = 1

Link to post
Share on other sites
Dazzla

Well it's just been proven two times, and disproven zip times. I'd say you've got one up on your mates.

Link to post
Share on other sites
Samoa
Another proof that it does equal 1:

0.111... = 1/9

0.111...*9 = 0.999...

since 0.111.... = 1/9    ->  1/9 * 9 = 0.999...

                                        1/9 * 9 = 9/9 = 1

That is incorrect.

1/9 * 9/1 is not the same as 1.... it is .9999.... and cannot equal 1

1/9 = .1111111...

.11111... * 9 = .9999999...

Link to post
Share on other sites
Dazzla

Uhh, you've just posted exactly what he said.

You just said:

1/9 = .1111111...

1/9 * 9 = 1

.1111111... * 9 = 0.9999...

So you just proved 0.999.... = 1

Congratulations.

If Dazzla gives 1 chocolate bar each to 9 kiddies then not only is he weird but they have 1/9 of my stash of sweets, when then give them back I don't have 0.99999.... of a stash, I have one; the beauty of fractions... :p

Link to post
Share on other sites
Samoa
x = 0.9999...

10x = 9.9999...

10x - x = 9x

9.9999... - 0.9999... = 9

9 = 9x

1 = x = 0.9999...

if x=.9999

then X cannot equal 1

10x=9.9999 true

10x-x=9x is not true

10(.9999)-.9999=9

9(.9999)=8.991 therefore

9=8.991 is not correct

Link to post
Share on other sites
un4given1

so... if what you are saying is correct... .9999999999999999999999...=1

So, if you divide 1 by .9999999999999999999999... then you should get 1 right, because 10/10=1 9/9=1 (here's my proofs)

But, infact you get 1.0000000000000000000000000000...1

Thank you

Link to post
Share on other sites
Dazzla
10x=9.9999 true

(Y)

10x-x=9x is not true

(N) LMAO!

10(.9999)-.9999=9

9(.9999)=8.991 therefore

9=8.991 is not correct

Totally misunderstood...

Link to post
Share on other sites
Samoa
Uhh, you've just posted exactly what he said.

You just said:

1/9 * 9 = 1

.1111111... * 9 = 0.9999...

So you just proved 0.999.... = 1

Congratulations.

If Dazzla gives 1 chocolate bar each to 9 kiddies then not only is he weird but they have 1/9 of my stash of sweets, when then give them back I don't have 0.99999.... of a stash, I have one; the beauty of fractions... :p

your math calculations are totally wacked dazzla,

.11111 is not 1

the equations of .1111 * 9 = .99999 is not saying .999 is 1

IT IS LESS THAN ONE.

Link to post
Share on other sites
Dazzla
so... if what you are saying is correct... .9999999999999999999999...=1

So, if you divide 1 by .9999999999999999999999... then you should get 1 right, because 10/10=1 9/9=1 (here's my proofs)

But, infact you get 1.0000000000000000000000000000...1

Thank you

Hahaha, did you do that on calc.exe?

Link to post
Share on other sites
Dazzla
Uhh, you've just posted exactly what he said.

You just said:

1/9 * 9 = 1

.1111111... * 9 = 0.9999...

So you just proved 0.999.... = 1

Congratulations.

If Dazzla gives 1 chocolate bar each to 9 kiddies then not only is he weird but they have 1/9 of my stash of sweets, when then give them back I don't have 0.99999.... of a stash, I have one; the beauty of fractions... :p

your math calculations are totally wacked dazzla,

.11111 is not 1

the equations of .1111 * 9 = .99999 is not saying .999 is 1

IT IS LESS THAN ONE.

Please, point out where I said .1111 = 1.

0.9 recurring has been mathematically proven time and time again and is a known fact.

Link to post
Share on other sites
un4given1
10x-x=9x is not true

where the hell did you go to school?

If you subtract something from one side you also have to subtract it from the other side. You can't just make up your own rules.

Link to post
Share on other sites
Samoa

Dazzla and anyone who believes that .9999 is the same as 1, needs to go back to school or should not have dropped out.

I showed your calculations were incorrect, and you laugh cause you think I'm wrong??? Please. Calculators don't lie.

Link to post
Share on other sites
Dazzla

OMG, this can't be done on a freaking calcluator because it goes on to infinity you idiot!

0.9 recurring is a rational number, the same way that 0.3 recurring = 1/3. FOOL

Link to post
Share on other sites
bangbang023
x = 0.9999...

10x = 9.9999...

10x - x = 9x

9.9999... - 0.9999... = 9

9 = 9x

1 = x = 0.9999...

I think you a made a mistake:

10x = 9.9999

but why subtract x then? that doesn't make sense. You would have to divide the X if you want to get it to the other side.

Link to post
Share on other sites
Samoa
where the hell did you go to school?

If you subtract something from one side you also have to subtract it from the other side. You can't just make up your own rules.

HELLO

LOOK AT DAZZLA'S ORIGINAL FORMULAS, THAT'S WHERE i GOT IT. I WAS DISSPROVING HIS CALUCULATIONS...

Did you even go to school?

Link to post
Share on other sites
Dazzla

More proof:

0.3 recurring = 1/3

0.3 recurring * 3 = 0.9 recurring

1/3 *3 = 1

0.9 recurring CANNOT be done on a freaking calculator!

Link to post
Share on other sites
Dazzla
x = 0.9999...

10x = 9.9999...

10x - x = 9x

9.9999... - 0.9999... = 9

9 = 9x

1 = x = 0.9999...

I think you a made a mistake:

10x = 9.9999

but why subtract x then? that doesn't make sense. You would have to divide the X if you want to get it to the other side.

People, it's not 0.9999, a zero then a decimal place then 4 nines, it goes on to infinity, you CANNOT use a calculator!

Link to post
Share on other sites
Imperfect63

oh my, such a simple proof yet so many confused minds... should i show a 1 = 0 proof? :p

Link to post
Share on other sites
bangbang023
x = 0.9999...

10x = 9.9999...

10x - x = 9x

9.9999... - 0.9999... = 9

9 = 9x

1 = x = 0.9999...

I think you a made a mistake:

10x = 9.9999

but why subtract x then? that doesn't make sense. You would have to divide the X if you want to get it to the other side.

People, it's not 0.9999, a zero then a decimal place then 4 nines, it goes on to infinity, you CANNOT use a calculator!

I'm not using a calculator. I am doing the written math. you get 10x = 9.999.....

so why are you subtracting X? You don't subtract, you divide by 10 to ge tthe X by itself. if you subract x from one side you must also do it the the other side.

Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
  • Recently Browsing   0 members

    No registered users viewing this page.