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•  » Can you find x^5 + 1/(x^5) without solving for x?

## #1 2012-12-18 22:55:37

Agnishom
Real Member

Online

### Can you find x^5 + 1/(x^5) without solving for x?

If x^2 - 3x + 1 = 0
then find x^5 + 1/x^5

'And fun? If maths is fun, then getting a tooth extraction is fun. A viral infection is fun. Rabies shots are fun.'
'God exists because Mathematics is consistent, and the devil exists because we cannot prove it'
'Who are you to judge everything?' -Alokananda

## #2 2012-12-18 23:11:57

bobbym

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### Re: Can you find x^5 + 1/(x^5) without solving for x?

Hi Agnishom;

In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

## #3 2012-12-18 23:26:32

Agnishom
Real Member

Online

### Re: Can you find x^5 + 1/(x^5) without solving for x?

What do I need to know in order to find out the expansion of (x +1/x)^5?

'And fun? If maths is fun, then getting a tooth extraction is fun. A viral infection is fun. Rabies shots are fun.'
'God exists because Mathematics is consistent, and the devil exists because we cannot prove it'
'Who are you to judge everything?' -Alokananda

## #4 2012-12-18 23:31:35

bobbym

Offline

### Re: Can you find x^5 + 1/(x^5) without solving for x?

All problems have a trick associated with them. Good problem solvers have lots of tricks up their sleeves.

All these problems are solved by turning something of the form

Notice how artificially the polynomial given expands into that form.

In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

## #5 2012-12-18 23:35:21

Agnishom
Real Member

Online

### Re: Can you find x^5 + 1/(x^5) without solving for x?

#### bobbym wrote:

]

How do I get this? Do I need the binomial theorem?

'And fun? If maths is fun, then getting a tooth extraction is fun. A viral infection is fun. Rabies shots are fun.'
'God exists because Mathematics is consistent, and the devil exists because we cannot prove it'
'Who are you to judge everything?' -Alokananda

## #6 2012-12-18 23:37:13

bobbym

Offline

### Re: Can you find x^5 + 1/(x^5) without solving for x?

Exactly or Pascals triangle.

In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

## #7 2012-12-18 23:41:07

Agnishom
Real Member

Online

### Re: Can you find x^5 + 1/(x^5) without solving for x?

Hmm... Thanks!

'And fun? If maths is fun, then getting a tooth extraction is fun. A viral infection is fun. Rabies shots are fun.'
'God exists because Mathematics is consistent, and the devil exists because we cannot prove it'
'Who are you to judge everything?' -Alokananda

## #8 2012-12-18 23:45:18

bobbym

Offline

### Re: Can you find x^5 + 1/(x^5) without solving for x?

Hi Agnishom;

You are welcome. Please have patience you are improving. "All things come to he who waits - pappym.

In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

## #9 2012-12-19 00:08:35

Agnishom
Real Member

Online

### Re: Can you find x^5 + 1/(x^5) without solving for x?

If you don't mind, is "bobbym" your real name?

'And fun? If maths is fun, then getting a tooth extraction is fun. A viral infection is fun. Rabies shots are fun.'
'God exists because Mathematics is consistent, and the devil exists because we cannot prove it'
'Who are you to judge everything?' -Alokananda

## #10 2012-12-19 00:13:07

bobbym

Offline

### Re: Can you find x^5 + 1/(x^5) without solving for x?

Yes, pappym was my dear old Dad. A good ole boy from deep in Alabama.

[removed]

In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

## #11 2012-12-19 05:55:42

anonimnystefy
Real Member

Offline

### Re: Can you find x^5 + 1/(x^5) without solving for x?

And what was removed?

I really like the "Pass me the chicken" quote from pappym.

The limit operator is just an excuse for doing something you know you can't.
“It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman
“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

## #12 2012-12-19 06:07:24

bobbym

Offline

### Re: Can you find x^5 + 1/(x^5) without solving for x?

#### anonimnystefy wrote:

And what was removed?

My real age of course!

In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

## #13 2012-12-19 07:51:31

anonimnystefy
Real Member

Offline

### Re: Can you find x^5 + 1/(x^5) without solving for x?

The limit operator is just an excuse for doing something you know you can't.
“It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman
“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

## #14 2012-12-19 07:58:09

bobbym

Offline

### Re: Can you find x^5 + 1/(x^5) without solving for x?

That he did. That was removed also.

In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

## #15 2012-12-19 15:49:02

Agnishom
Real Member

Online

### Re: Can you find x^5 + 1/(x^5) without solving for x?

So, bobbym wants to be more anonymous than anonymnistefy?

'And fun? If maths is fun, then getting a tooth extraction is fun. A viral infection is fun. Rabies shots are fun.'
'God exists because Mathematics is consistent, and the devil exists because we cannot prove it'
'Who are you to judge everything?' -Alokananda

## #16 2012-12-19 18:11:08

bobbym

Offline

### Re: Can you find x^5 + 1/(x^5) without solving for x?

If I wanted to be anonymous I would not have told you the answers.

In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.
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