some years ago I read from a local newspaper informing readers on the attempt of a Japanese team of scientists in finding innumerable digits of 'pi' by means of the then most advanced computer in a university. I'm sorry I can't recall it as well as the result. Do some people have some facts or reasons on the matter? Thanks.
2007-02-11 00:33:13 · 7 answers · asked by Arigato ne 5 in Science & Mathematics ➔ Mathematics
The rational number 22⁄7 is a widely used "approximation" of pi.
Archimedes proved the inequalities 3 + 10/71 < π < 3 + 1/7, by means of regular polygons with 96 sides.
try this site,
http://3.141592653589793238462643383279502884197169399375105820974944592.com/index1.html
it has Pi to one MILLION decimal places.
the team in university of Tokyo have calculated it to 1.24 trillion places.(2005)
2007-02-11 01:05:37 · answer #1 · answered by Tharu 3 · 0⤊ 0⤋
First, you have to understand that pi is not EXACTLY 22/7. The actual value of pi goes on forever and ever.
The only reason most people try to use computers to find digits of pi is to test the power of those computers.
2007-02-11 08:54:31 · answer #2 · answered by dennismeng90 6 · 1⤊ 0⤋
22/7 is but an approximate figure for pi. Pi is an irrational (trascendent, for it has been proven that it is not the solution of any polinomial equation) number, with infinite digits.
The interest in finding lots of digits of pi is not to help to calculate with precision. With a relatively short number of digits we can do calculations up to a precision enough for practical purposes. The interest in calculating a large number of digits has to do with studies related to probabilty and statistic, for digits of a real number are supposed to occur at random, without any pattern, and this is the subject under scientific investigation.
2007-02-11 08:51:41 · answer #3 · answered by Jano 5 · 0⤊ 0⤋
by definition pi is an irrational number
irrational numbers can not be expressed as fractions
however because we cannot calculate the exact value
(3.14 or 3.1416 are used in make approximations)
another value that is a close approximation is 22/7
but 22/7 is not pi
it is not even irrational because it is a fraction and fractions
are rational numbers
2007-02-11 08:54:32 · answer #4 · answered by dla68 4 · 1⤊ 0⤋
22/7 isn't equal to PI, and the key difference between fractions and irrational numbers is that fractions have a sequence of repeating decimals while irrational numbers do not.
22/7 has a sequence of repeating decimals "142857"
(3.142857114285711428572 ... ), whereas PI does not
(3.1415926535897932384626433832795 ... ).
PI has already been established to be an irrational number (and there are many proofs to show this).
2007-02-11 08:42:38 · answer #5 · answered by Puggy 7 · 2⤊ 0⤋
I know. It's like Math, and other subjects. They're forever aren't they?
2007-02-11 09:24:03 · answer #6 · answered by aduka452 1 · 0⤊ 0⤋
Awww, they are just (still) trying to square the circle!
:)
2007-02-11 08:40:20 · answer #7 · answered by mikedotcom 5 · 0⤊ 1⤋