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#1 2006-11-21 02:07:52

(name not specified)
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1/pi

what is 1/pi??

pi is a reecurring digit, rite?

so, 1/pi would be te same as 1/3.1415926535..................................................................etc.etc.etc.......

what is the basic naame for it thogh? i meen, is it 1 pith? 1 over pi? 1 piessimal?? i am really confused. please help.

thanks in advanse.

#2 2006-11-21 03:25:29

mathsyperson
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Registered: 2005-06-22
Posts: 4,900

Re: 1/pi

There isn't really any way of saying 1/pi, other than 1/pi.

π is transcendental, so no matter what you do to it (other than dividing by π or something) it will always stay transcendental, so there's no simpler way of writing it. I've never heard anyone call it a "pieth" or anything like that, either. I think you'll just have to stick with 'one over pi'.


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#3 2006-11-21 11:12:12

Zhylliolom
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Registered: 2005-09-05
Posts: 412

Re: 1/pi

I like to pronounce it Γ-²(½).

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#4 2006-12-27 22:18:03

krassi_holmz
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Registered: 2005-12-02
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Re: 1/pi

I like it this way:


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#5 2006-12-27 22:20:09

luca-deltodesco
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Registered: 2006-05-05
Posts: 1,470

Re: 1/pi

nah i prefer


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#6 2006-12-27 22:50:03

Toast
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Registered: 2006-10-08
Posts: 1,321

Re: 1/pi

I put them into my calculator, why don't they equal 1/pi sad

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#7 2006-12-27 22:54:05

luca-deltodesco
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Registered: 2006-05-05
Posts: 1,470

Re: 1/pi

thats because you have to set it to DRASTIC mode first.


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#8 2006-12-27 23:03:46

Toast
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Registered: 2006-10-08
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Re: 1/pi

Ah of course, that's better XD

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#9 2006-12-28 10:04:47

Devantè
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Registered: 2006-07-14
Posts: 6,400

Re: 1/pi

Haha, a pieth...

Original.

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#10 2006-12-30 03:21:38

krassi_holmz
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Registered: 2005-12-02
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Re: 1/pi

DRASTIC ?
What means that?


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#11 2006-12-30 04:17:18

Toast
Real Member
Registered: 2006-10-08
Posts: 1,321

Re: 1/pi

It my be different for your calculator, but when press MODE, and go to the third page, the fifth option is DRASTIC mode, and you can turn it on or off.

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#12 2006-12-30 04:30:24

krassi_holmz
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Registered: 2005-12-02
Posts: 1,905

Re: 1/pi

mh.
And what does this DRASTIC?


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#13 2006-12-30 04:31:52

Toast
Real Member
Registered: 2006-10-08
Posts: 1,321

Re: 1/pi

Uhhhhmmmm.... makes everything equal to 1/pi.

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#14 2006-12-30 07:39:25

krassi_holmz
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Registered: 2005-12-02
Posts: 1,905

Re: 1/pi

mhm.
But my sum is correct. tongue


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#15 2006-12-30 17:03:06

Toast
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Registered: 2006-10-08
Posts: 1,321

Re: 1/pi

Does it really?
When simplified it looks like this...

How do you check it's equal to 1/pi?

Last edited by Toast (2006-12-30 17:04:24)

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#16 2006-12-31 01:52:05

krassi_holmz
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Registered: 2005-12-02
Posts: 1,905

Re: 1/pi

It's too hard to be simplified. But it can be proved:

Last edited by krassi_holmz (2006-12-31 01:53:29)


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#17 2006-12-31 01:56:56

krassi_holmz
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Registered: 2005-12-02
Posts: 1,905

Re: 1/pi

Another formula is:


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#18 2006-12-31 01:58:36

krassi_holmz
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Registered: 2005-12-02
Posts: 1,905

Re: 1/pi

These formulas are based on modular forms. They are the best known series for computing pi.


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#19 2006-12-31 02:05:44

krassi_holmz
Real Member
Registered: 2005-12-02
Posts: 1,905

Re: 1/pi

If you don't beleive me now, you can visit:
http://mathworld.wolfram.com/PiFormulas.html
The first formula is namely number 77 and the second is 82. smile


IPBLE:  Increasing Performance By Lowering Expectations.

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#20 2006-12-31 09:13:14

Toast
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Registered: 2006-10-08
Posts: 1,321

Re: 1/pi

Wow that's some rrrreally crazy stuff dizzy

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#21 2007-01-01 09:00:50

krassi_holmz
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Registered: 2005-12-02
Posts: 1,905

Re: 1/pi

But not the craziest.


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#22 2007-01-02 04:45:58

Patrick
Real Member
Registered: 2006-02-24
Posts: 1,005

Re: 1/pi

krassi, please say you don't have those formulae in your head..


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