Math Is Fun Forum

FERMAT'S

Member

Registered: 2011-01-17

Posts: 29

Help

  Hi everyong

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

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

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: Help

Hi;

When the numbers are all positive then x mod y means what is the remainder when x is divided by y.

In the general case use this formula:

You should be able to solve your problem now.

---

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

FERMAT'S

Member

Registered: 2011-01-17

Posts: 29

Re: Help

-3/45=-1/15

right

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: Help

Hi;

You should get positive 3 instead of -3

---

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

FERMAT'S

Member

Registered: 2011-01-17

Posts: 29

Re: Help

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

Last edited by FERMAT'S (2011-04-11 18:14:39)

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: Help

Hi;

allways put it in  possitive ?? right

Let us do one thing at a time or else I will get confused. I would rather you followed the formula I gave you already. It is safer than trying to think about them.

---

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

FERMAT'S

Member

Registered: 2011-01-17

Posts: 29

Re: Help

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

Thank you so much . I appreciate it

Last edited by FERMAT'S (2011-04-11 18:21:59)

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: Help

To do your egyptian fractions requires a ceiling function. If you have problems come back.

---

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

FERMAT'S

Member

Registered: 2011-01-17

Posts: 29

Re: Help

  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

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: Help

Do you mean as an egyptian fraction?

I am only getting:

---

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

FERMAT'S

Member

Registered: 2011-01-17

Posts: 29

Re: Help

yes

as an egyptian fraction

FERMAT'S

Member

Registered: 2011-01-17

Posts: 29

Re: Help

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

Last edited by FERMAT'S (2011-04-11 19:09:24)

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: Help

Hi FERMAT'S;

That might be difficult. Hold on please.

Here is a sevener:

What forum?

---

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

gAr

Member

Registered: 2011-01-09

Posts: 3,482

Re: Help

Hi,

One more:

---

"Believe nothing, no matter where you read it, or who said it, no matter if I have said it, unless it agrees with your own reason and your own common sense"  - Buddha?

"Data! Data! Data!" he cried impatiently. "I can't make bricks without clay."

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: Help

Hi all;

And yet another one!

---

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

gAr

Member

Registered: 2011-01-09

Posts: 3,482

Re: Help

And one morrre:

Last edited by gAr (2011-04-11 21:37:56)

---

"Believe nothing, no matter where you read it, or who said it, no matter if I have said it, unless it agrees with your own reason and your own common sense"  - Buddha?

"Data! Data! Data!" he cried impatiently. "I can't make bricks without clay."

noemi

Member

Registered: 2010-01-07

Posts: 2,333

Re: Help

so gAr.. sorry for the off topic..but i've just noticed ur signature.. and would like to ask u what is ur definition of faith then? (There was one wise man who said to Hebrews(11:1) ..Now faith is the substance of things hoped for, the evidence of things not seen. ) Do all have ppl have good reason and common sense?

gAr

Member

Registered: 2011-01-09

Posts: 3,482

Re: Help

Hi noemi,

Well, the signature is not really targeted at anything, just a pun - notice the "?" ?

---

"Believe nothing, no matter where you read it, or who said it, no matter if I have said it, unless it agrees with your own reason and your own common sense"  - Buddha?

"Data! Data! Data!" he cried impatiently. "I can't make bricks without clay."

noemi

Member

Registered: 2010-01-07

Posts: 2,333

Re: Help

yup, it is Buddha's.. i was just wondering..
what does it mean 'a pun'?

Last edited by noemi (2011-04-12 05:16:25)

gAr

Member

Registered: 2011-01-09

Posts: 3,482

Re: Help

Okay, good that you asked, otherwise you would have been still wondering

---

"Believe nothing, no matter where you read it, or who said it, no matter if I have said it, unless it agrees with your own reason and your own common sense"  - Buddha?

"Data! Data! Data!" he cried impatiently. "I can't make bricks without clay."

noemi

Member

Registered: 2010-01-07

Posts: 2,333

Re: Help

lol

Last edited by noemi (2011-04-12 05:27:35)

FERMAT'S

Member

Registered: 2011-01-17

Posts: 29

Re: Help

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 ??????

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: Help

Hi;

did you do it by egyptian fraction theory.

Yes and a computer too.

---

In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.