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## #1 Help Me ! » Newten » 2011-07-05 13:41:43

FERMAT'S
Replies: 1

Hello everyone

I have read before ( but I don't know where ) about something calld "newten theory" which is about roots and equations.

I think the theory is about finding the conclussion of equations root in n term

for example

if X1 ,X2,X3,X4,X5,.................,Xn are roots for the equation

aX^n+bx^(n-2)+............................+c=0

by using this theory we can find the conclusion of x1^n+x2^n+................+xn^n=?? directly.

Thank you.

## #2 Re: Help Me ! » Help » 2011-07-05 13:36:20

bobbym wrote:

Hi FERMAT'S;

That might be difficult. Hold on please.

Here is a sevener:

What forum?

how ?

did you do it by egyptian fraction theory ??????

## #3 Re: Help Me ! » Help » 2011-04-11 19:08:14

actually I found this quastion in a math forum

Find a,b,c,d,e,f,g if they are natural numbers  N = 1,2,3,..................

and

7/30 = 1/a + 1/b + 1/ c + 1/d + 1/ e + 1/f + 1/g

## #4 Re: Help Me ! » Help » 2011-04-11 19:01:44

yes

as an egyptian fraction

## #5 Re: Help Me ! » Help » 2011-04-11 18:44:10

last thing

How to expand the fraction . for example

5/121 is divided in two ways . the first one is longer than the other

can you expalin it with a small example like

7/30 .
Divide it to 7 fractions.

Thank you

## #6 Re: Help Me ! » Help » 2011-04-11 18:21:28

yes I it was my fault
I used it in a worng way
but I got it

Thank you so much . I appreciate it

## #7 Re: Help Me ! » Help » 2011-04-11 18:09:18

allways put it in  possitive ?? right

can you look at this

http://en.wikipedia.org/wiki/Greedy_algorithm_for_Egyptian_fractions

(simplifying the second term in this replacement as necessary). For instance:

7/15 = 1/3+2/15  ???

the remainder should be 1

that means it should be

7/15 = 1/3 + 1/45 , should not it ? According to the rulle

It does not make sens but the rule says that

-3/45=-1/15

right

## #9 Help Me ! » Help » 2011-04-11 17:37:53

FERMAT'S
Replies: 22

Hi everyong

could please explain me what does y mod x mean ??
and find

(-15 mod 6 ) / ( 15 . 3 )

## #10 Re: Help Me ! » prime numbers ` » 2011-02-27 18:44:32

by the way
thank you so much .

## #11 Re: Help Me ! » prime numbers ` » 2011-02-27 18:39:12

I knew it from someone .
and I read it again in a Teaching Package.
but I don't have this package now > so I want to be sure aout this infornmation.

## #12 Re: Help Me ! » prime numbers ` » 2011-02-27 18:24:42

hi bobbym

could you please the method that I wrote above ? and tell me if it true
thanx

## #13 Re: Puzzles and Games » Lots of maths puzzles » 2011-02-27 13:36:24

WoOoOoW
tHaNk YoU So MuCh

are there the solutions ?

## #14 Re: Help Me ! » prime numbers ` » 2011-02-27 13:29:56

I read one before that says .
if X is integer
to know if X is prime or not .
First find a square number that is biger tahn X and let's call it y ^2
so
root(x ) <y

second, divide  X on all the square number between 2 - y
now , if the result is integer number so X is not prime . if it is not so x is a prime number .

I hope if this right .

## #15 Help Me ! » prime numbers ` » 2011-02-27 13:23:43

FERMAT'S
Replies: 12

Hi everyone

could u please write me the methods those to know if the number is prime number ?

## #16 Help Me ! » Number theory » 2011-01-19 14:16:14

FERMAT'S
Replies: 1

Hi everybody

do u know a good book for ( Number theory )) basices , and has some of BIMO quastions ??

## #17 Re: Help Me ! » who can solve it ?? » 2011-01-18 19:28:54

woOoOow

I will think about it , thank u for the hint for a new problem
I tried to prove this rule >>> (n-1+j)C j , I wondered from where the Combinations came ?

I have quastion is there a link for IMO training in this forum.:

thank u so much

## #19 Re: Help Me ! » who can solve it ?? » 2011-01-18 18:57:15

actually I read  a rule says

if x1,x2,x3,........,xn Integers numbers but not negative
so the number of solutions for x1+x2+x3+x4+........+xn=j

is
(n-1+j)C j

I Wanna be sure if is it right ?

## #20 Re: Help Me ! » who can solve it ?? » 2011-01-18 18:51:11

ok thanx for that

what about if we say  a+b+c+d=8

how many solutins there are ?

## #21 Re: Help Me ! » who can solve it ?? » 2011-01-18 18:37:12

Sorry there was a mistake in the quastion

I fixed the mistake

thank u

## #22 Re: Help Me ! » Probability » 2011-01-18 18:31:46

I got the same bobbym's answer

65780 ways = 26C5

thank u for the quastion

## #23 Help Me ! » who can solve it ?? » 2011-01-18 18:06:34

FERMAT'S
Replies: 10

:

if x,y,z are Integers numbers but not negative (0,1,2,3,4,5,6...........))
(( if u have other sentence better than this please tell me ))

how many solutions there are in this formulas.

x+y+z=2

and what are they ??

I know it is easy question , I just wanna be sure of something

thanx :):):)

## #24 Re: Introductions » Hi everyone » 2011-01-18 17:58:58

thank u too, genesh moderator

and it is my pleasure to be a member in this big forum of informations.:)

thank u bobbym