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## #501 2012-05-18 10:15:25

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

### Re: Bafflers?

Hi gAr;

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.

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## #502 2012-05-18 17:21:07

gAr
Member
Registered: 2011-01-09
Posts: 3,479

### Re: Bafflers?

Hi bobbym,

"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."

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## #503 2012-05-18 20:35:19

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

### Re: Bafflers?

Hi gAr;

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.

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## #504 2012-05-18 22:50:01

gAr
Member
Registered: 2011-01-09
Posts: 3,479

### Re: Bafflers?

Hi,

"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."

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## #505 2012-05-19 00:05:05

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

### Re: Bafflers?

Hi gAr;

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.

Offline

## #506 2012-05-19 01:36:01

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

### Re: Bafflers?

Find the equation of the line that intersects x^2 - 4x - 6 at two points A and B, has a slope of 5 and the distance between A and B is exactly 10.

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.

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## #507 2012-05-20 02:03:45

gAr
Member
Registered: 2011-01-09
Posts: 3,479

### Re: Bafflers?

Hi bobbym,

The composition of g.f's is something that I didn't know.
Woo hoo, that's amazing!
What other problems can it solve?

"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."

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## #508 2012-05-20 02:18:27

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

### Re: Bafflers?

Hi gAr;

Anytime something depends on how many of the other. Basically it is for this type of problem. I do not remember whether Conroy does one but I know that Tucker showed me how. This is the standard book problem.

I have 2 die. I throw one and then throw the other as many times as the number that comes up on the first die.What are the probabilities for each possible sum?

So we use the composition of functions to do this:

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.

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## #509 2012-05-20 02:35:21

gAr
Member
Registered: 2011-01-09
Posts: 3,479

### Re: Bafflers?

Hi,

Okay, thanks for the problem, and the nice solution.

Find the equation of the line that intersects x^2 - 4x - 6 at two points A and B, has a slope of 5 and the distance between A and B is exactly 10.

"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."

Offline

## #510 2012-05-20 02:59:30

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

### Re: Bafflers?

Hi gAr;

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.

Offline

## #511 2012-05-20 03:02:09

gAr
Member
Registered: 2011-01-09
Posts: 3,479

### Re: Bafflers?

Thanks!
I'll take a break, see you later...

"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."

Offline

## #512 2012-05-20 03:05:25

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

### Re: Bafflers?

Okay, thanks for coming in and working on the problems.

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.

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## #513 2012-05-20 03:26:24

anonimnystefy
Real Member
From: Harlan's World
Registered: 2011-05-23
Posts: 16,037

### Re: Bafflers?

Hi bobbym

Here lies the reader who will never open this book. He is forever dead.
Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment
The knowledge of some things as a function of age is a delta function.

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## #514 2012-05-20 05:42:34

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

### Re: Bafflers?

Hi;

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.

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## #515 2012-05-20 06:04:44

anonimnystefy
Real Member
From: Harlan's World
Registered: 2011-05-23
Posts: 16,037

### Re: Bafflers?

And what is the correct one.

Here lies the reader who will never open this book. He is forever dead.
Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment
The knowledge of some things as a function of age is a delta function.

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## #516 2012-05-20 06:06:45

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

### Re: Bafflers?

Hmmmm. I feel a rant coming on...

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.

Offline

## #517 2012-05-20 06:25:45

anonimnystefy
Real Member
From: Harlan's World
Registered: 2011-05-23
Posts: 16,037

### Re: Bafflers?

Here lies the reader who will never open this book. He is forever dead.
Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment
The knowledge of some things as a function of age is a delta function.

Offline

## #518 2012-05-20 06:35:03

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

### Re: Bafflers?

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.

Offline

## #519 2012-05-20 06:39:12

anonimnystefy
Real Member
From: Harlan's World
Registered: 2011-05-23
Posts: 16,037

### Re: Bafflers?

Last edited by anonimnystefy (2012-05-20 06:44:48)

Here lies the reader who will never open this book. He is forever dead.
Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment
The knowledge of some things as a function of age is a delta function.

Offline

## #520 2012-05-20 06:57:13

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

### Re: Bafflers?

anonimnystefy wrote:

What is the point of simplifying?

Also,you are really starting to get on my nerves a little (not really,but I am lacking the right expression).When I simplify you say don't.When I don't you say simplify.I can't keep up with you.

I am not trying to get on your nerves. These threads demand a little bit more accuracy. We get that accuracy by correcting each other. I realize that is hard to do without offending someone. But I hope you will understand that someone who corrects you is at that moment your best friend, if he is right of course.

Would you leave an answer as 2 / 4 or 32 / 64 or 50 / 100? For one thing you might confuse the person who is marking your paper. 2630 / 104 does not immediately look like 1315 / 52.

I never say in an answer not to simplify except in some rare cases. We can talk about them if you like. Sometimes when working on a problem it is advantageous to not simplify until the end. Those cases are rare.

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.

Offline

## #521 2012-05-20 07:22:51

anonimnystefy
Real Member
From: Harlan's World
Registered: 2011-05-23
Posts: 16,037

### Re: Bafflers?

Hi bobbym

I am not trying to offend you.I noted that I was lacking the right expression.

Well,I usually cancel,but a person marking my paper should be an expert on the subject capable on recognizing different forms of an answer.

Here lies the reader who will never open this book. He is forever dead.
Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment
The knowledge of some things as a function of age is a delta function.

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## #522 2012-05-20 08:31:58

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

### Re: Bafflers?

I am not offended. You should not be trying to keep up with me. Never compete with an old man. There are two possibilities:

1)You beat him but you get no credit because everyone thinks you just beat a has been, a spent force long past his prime.

2) He uses his tremendous experience to beat you and you look doubly ridiculous having just lost to Grandpa.

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.

Offline

## #523 2012-05-20 08:52:14

anonimnystefy
Real Member
From: Harlan's World
Registered: 2011-05-23
Posts: 16,037

### Re: Bafflers?

Who is trying to keep up with you?

Here lies the reader who will never open this book. He is forever dead.
Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment
The knowledge of some things as a function of age is a delta function.

Offline

## #524 2012-05-20 08:53:03

bobbym
bumpkin
From: Bumpkinland
Registered: 2009-04-12
Posts: 109,606

### Re: Bafflers?

That is what you said in your quote.

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.

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## #525 2012-05-20 09:09:07

anonimnystefy
Real Member
From: Harlan's World
Registered: 2011-05-23
Posts: 16,037

### Re: Bafflers?

Oh,that! That was not the same meaning you used.

Here lies the reader who will never open this book. He is forever dead.
Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment
The knowledge of some things as a function of age is a delta function.

Offline