hmm Maths, Physics etc thread...

[leungtl]

Originally posted by yim87


i got high distinctions for those maths and science competitions held by UNSW u know..

Really? But you're in Year 9 aren't you (judging by your username of yim87, I can only assume you were born in 1987)?

Ah well, I'm proud of my 'Participation' certificate... I franed it

 

[yim87]

i'm in Year 10.. we start education one year earlier in Singapore..

got those high d's a couple of years ago..

 

[Parra Power]

i got a high d in year 7, and a distinction in every other year

i thought it had something to do with x-x=0.....

 

[schmeichel01]

ill admit I bother reading past the first page, but the problem is with the decimal system, for accuracy keep the numbers in either fraction, or root form and you should be fine.

 

[Jambo Den]

Re: hmm Maths, Physics etc thread...

Originally posted by Alex

I wouldnt consider myself a nerd

Well I would, so it looks like it's bedtime for you. You see, due to the divine grace of God he chose to make most of us efficient and meaningful; but he made you as much use as a sunflower in the Faroe Islands.

unless a nerd means that i pay a natural interest into those subjects because I understand them

Uh? Are you implying you're the only person on these boards with more than a glimmer of intelligence? That reeks of arrogance sonny.

...If it means im a nerd, so be it...But Im still sure ive been with hotter chicks than a fair few of you guys in the last 12months

Wow, you must be fighting them off with a stick if you give 'em the ol' maths theories! You must have a fancy formula on how to bed a chick within twenty minutes. Unless you mean baby chickens that have been under light of course...

For now thats all from me..

Good. Gonnae keep it that way?

 

[JTNY]

I do maths at school.

 

[Rob]

Me to.

 

[JTNY]

x=x, yes.
2x=x, no.


x, can take the form of any number, yes, does anyone here no of a number that is not zero when multiplied by 2 equals itself?

You could write 2x=x, : =0, that is, when it is without value. You can transpose that to equal:

x = x/2, now which number when multiplied by 2 and divided equals itself?




Now, the thing about 1/3 = .33 recurring
2/3 = .66 recurring
3/3 = .99 recurring, or is that 1?

Yet, 2 on 3. When one works out a fraction to decimals, you can make the bottom equal one hundred, and then multiplying the top by the value that got the bottom to one hundred, then dividing out. (You can really divide straight away, but this is easier to work out manually).

1/2, 2 gets to 100, by being multiplied by 50. 50/100, 50 divide 100 equals .5. 2/3 becomes 66.6666666666/99.9999999999999,
3, cannot get to 100. So that number will remain as 2/3, as will 1/3. Yet 3/3 can become 1. That is not an even interval.

0 - 1/3 = .333333333333333333
1/3 - 2/3 = .333333333333333333 (.666666666666 so far)
2/3 - 3/3 = .33333333333333334


It doesn't make sense. So what do we do? Nothing. That is the uncertaint of the universe. Uncertainty principles, to undermine any mathematical, physical theory, etc. Can it be resolved using our current partial theories, NO.


There is my 2 cents, or should I say, 1.99999999999 cents.

 

[Alex]

Originally posted by JTNY
x=x, yes.
2x=x, no.


x, can take the form of any number, yes, does anyone here no of a number that is not zero when multiplied by 2 equals itself?

You could write 2x=x, : =0, that is, when it is without value. You can transpose that to equal:

x = x/2, now which number when multiplied by 2 and divided equals itself?

Oh really!
JTNY, we're not stupid we realise this...BUT the point I was making was that the proof I wrote followed the rules of maths, but proved that 2x=x...The idea was that you had to find the mistake in the proof, NOT just tell me why 2x didnt equal x...

Now, the thing about 1/3 = .33 recurring
2/3 = .66 recurring
3/3 = .99 recurring, or is that 1?

Yet, 2 on 3. When one works out a fraction to decimals, you can make the bottom equal one hundred, and then multiplying the top by the value that got the bottom to one hundred, then dividing out. (You can really divide straight away, but this is easier to work out manually).

1/2, 2 gets to 100, by being multiplied by 50. 50/100, 50 divide 100 equals .5. 2/3 becomes 66.6666666666/99.9999999999999,
3, cannot get to 100. So that number will remain as 2/3, as will 1/3. Yet 3/3 can become 1. That is not an even interval.

0 - 1/3 = .333333333333333333
1/3 - 2/3 = .333333333333333333 (.666666666666 so far)
2/3 - 3/3 = .33333333333333334

Nah, thats wrong...You're treating the decimals as if they arent recurring. You dont get 4 on the end, because the recurring decimals means that you just keep on getting 3's.

It doesn't make sense. So what do we do? Nothing. That is the uncertaint of the universe. Uncertainty principles, to undermine any mathematical, physical theory, etc. Can it be resolved using our current partial theories, NO.


There is my 2 cents, or should I say, 1.99999999999 cents.

 

[Alex]

Originally posted by schmeichel01
ill admit I bother reading past the first page, but the problem is with the decimal system, for accuracy keep the numbers in either fraction, or root form and you should be fine.

Yeah, I agree...
Decimals simply dont work. I hate expressing things with them, and whenever I used to write down decimals Id write down as many as I could...

 

[industrie]

yadda yadda yadda... i've just got up from a nap... and am thinking wtf is going on hear... the problem has been solved... no need to argue... next question pls...

 

[AberdeenFC]

1+1= a window

 

[willem]

i'm getting sick of this thread...

 

[Alex]

Willem: Dont reply

I only replied becos someone else did (JTNY), and he wasnt entirely correct. But really, if you're sick of it, ignore it?

lol to Gavin

 

[nickclubman]

Re: hmm Maths, Physics etc thread...

Originally posted by Alex
After being influenced by the thread on the universe (which ended with me talking about time dilation), I thought itd be a good idea to start a thread for people that are interested in maths, physics and all those "nerdy" subjects...

I wouldnt consider myself a nerd, unless a nerd means that i pay a natural interest into those subjects because I understand them...If it means im a nerd, so be it...But Im still sure ive been with hotter chicks than a fair few of you guys in the last 12months

Anyway...

I was going to start with time dilation, but we already discussed that, so Ill start with a simpler one...

If 1/3=0.3333...
And 2/3=0.6666...
Then doesnt it follow that 3/3=0.999...

My maths teacher tried to prove to me that 0.9999...was equal to 1, by using the simple way of reducing a repeating decimal to a fraction, but this method has its flaws too...

That method goes something like this:
Line 1: let n=0.9999...
Line 2: therefore 10n=9.999...
Line 3: 10n-n=9.999...-0.9999...
Line 4: 9n=9
Therefore n=1

QED

OR does it?

Consider what we've just done on line 4.

9n=9, that is true enough, but to simplify this to n=1, isnt that assuming that 9/9=1 (or that 3/3=1 for that matter)...And isnt this the exact thing that we set out to prove?

In otherwords, this proof proves nothing, except that if we make an assumption, we can prove that assumption...

We can prove that 3/3=9/9, but can we prove it equals 1, not without using itself in the definition, which defeats the whole purpose of a definition....

Just one of the many flaws of our number system...

If anyone has anything interesting to add (or any theories theyd like explained) Im sure someone at SG would be interested, or know about the theory your asking about.

For now thats all from me..

Cheers

I know hate you with a passion lol.

I can't stand maths at all!

NK.

 

[Alex]

I love you too Nick