What do you think?

bobbym · 2012-04-03 18:11:41

Hi gAr;

Hi anonimnystefy;

Please calculate that. When you do you will notice that you submitted two different answers. I believe your second answer is much closer.

gAr · 2012-04-03 23:45:47

Hi bobbym,

bobbym · 2012-04-03 23:50:00

Hi gAr;

gAr · 2012-04-03 23:53:34

Hi bobbym,

Phew, from past couple of hours I was checking why it's not getting close, since most of the questions had answers near to that of B's!

And how are you? Moved to a new place?

bobbym · 2012-04-03 23:56:14

Hi gAr;

Sorry, but B got it wrong when he did this, so I put that into the problem. I had to research this answer when I posted this.

Yes, I moved. It was very hectic and just a blur of activity. I still have some work to do before I am done.

gAr · 2012-04-04 00:00:35

Hi,

Ok, it's a good problem. Thanks.
How's your new place? More greenery or more concrete?

bobbym · 2012-04-04 00:06:19

A little better scenery and better location but only about 150 yards from the other place.

gAr · 2012-04-04 00:10:07

Okay, I'll take a break.
See you later.

bobbym · 2012-04-04 00:13:57

Okay and thanks for working on the problem!

bobbym · 2012-04-23 04:54:37

New Problem:

A student approaches A with a dilemma. The student has a favorite calculator located here;

http://www.calcoolate.com/

The student would like to calculate this

on her favorite calculator of course. So she enters sqrt(3.0000000000000001)-sqrt(3)= and to her dismay the calculator returns 0. She knows that is not right and her faith in her calculator is shattered. She runs to A...
A says) Obvious proof of the stupidity of computers and the people who use them. You deserve that answer for trusting something that is clearly kaboobly doo!
The student begins to cry.
B says) Hold on A. You are mistaken. That is a pretty decent calculator, she just used it incorrectly.
The student explains to be B that she entered it correctly.
B says) I did not mean that. I meant you phrased the problem in a way that was numerically unstable and if you phrase it like...
C says) You hold on there B. A is right, as usual. I tried this on a bunch of calculators and even used your beloved mathematica and I got 0 too! Obviously 3.0000000000000001 = 3.
E says) How do you get that conclusion? Let's hear what B has to say on this.
A says) We have indulged B enough. I think C has a point. Look at 3.1, 3.01, 3.001, 3.0001, 3.00001 ... Doesn't that approach 3? Good work C! 3.0000000000000001 = 3
D says) Yes, I think C has hit it right on the head. And A's reasoning just brings tears of joy to my eyes.
E says) More like agony rather than joy.
Can you help the student get a decent answer to her problem using her calculator?

anonimnystefy · 2012-04-23 05:19:12

Hi bobbym

bobbym · 2012-04-23 05:26:56

Hi;

anonimnystefy · 2012-04-23 05:31:27

Hi bobbym

bobbym · 2012-04-23 06:04:06

anonimnystefy · 2012-04-23 06:27:30

Hi bobbym

bobbym · 2012-04-23 06:46:36

Hi;

anonimnystefy · 2012-04-23 06:50:30

Hi bobbym

[hide=reply]Then what?

"Can you demonstrate something we talked about that shows more understanding?"

What else is there?

bobbym · 2012-04-23 06:56:32

I sure can! What is the workhorse of numerical analysis?

anonimnystefy · 2012-04-23 06:58:52

Series?

bobbym · 2012-04-23 07:07:00

Close! What kind of series?

anonimnystefy · 2012-04-23 07:12:11

Asymptotic?

bobbym · 2012-04-23 07:15:25

Nope. Taylor series!

anonimnystefy · 2012-04-23 07:18:16

Hi

bobbym · 2012-04-23 07:31:58

Not exactly.

anonimnystefy · 2012-04-23 07:41:39

bobbym wrote:

Hi;

Problem #15:
What is the longest string of consecutive positive numbers that when added equal 2009?
Watch it it can be tricky.
This is the one I got. Is it the longest? No peeking!

which must be equal to 2009.So:

Because the sum should have as many terms as possible,we need n-m to maximum,so n-m+1 must also be maximum possible,but it still needs to be less than the term m+n And they need to be of the different parity.We write all possible factorization of 4018 into 2 factors:

1 4018
2 2009
7 574
14 287
41 98
49 82

So the largest possible length is 4.

Math Is Fun Forum

#1676 2012-04-03 18:11:41

Re: What do you think?

#1677 2012-04-03 23:45:47

Re: What do you think?

#1678 2012-04-03 23:50:00

Re: What do you think?

#1679 2012-04-03 23:53:34

Re: What do you think?

#1680 2012-04-03 23:56:14

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#1681 2012-04-04 00:00:35

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#1682 2012-04-04 00:06:19

Re: What do you think?

#1683 2012-04-04 00:10:07

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#1684 2012-04-04 00:13:57

Re: What do you think?

#1685 2012-04-23 04:54:37

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#1686 2012-04-23 05:19:12

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#1687 2012-04-23 05:26:56

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#1688 2012-04-23 05:31:27

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#1689 2012-04-23 06:04:06

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#1690 2012-04-23 06:27:30

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#1691 2012-04-23 06:46:36

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#1692 2012-04-23 06:50:30

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#1693 2012-04-23 06:56:32

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#1694 2012-04-23 06:58:52

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#1695 2012-04-23 07:07:00

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#1696 2012-04-23 07:12:11

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#1697 2012-04-23 07:15:25

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#1698 2012-04-23 07:18:16

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#1699 2012-04-23 07:31:58

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#1700 2012-04-23 07:41:39

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