homeGeek CultureWebstoreeCards!Forums!Joy of Tech!AY2K!webcam

The Geek Culture Forums!


Post New Topic  New Poll  Post A Reply
my profile | directory login | | search | faq | forum home
  next oldest topic   next newest topic
» The Geek Culture Forums!   » Techno-Talking   » Math-a-holics and Code Junkies   » Euclidean geoma trees

 - UBBFriend: Email this page to someone!    
Author Topic: Euclidean geoma trees
Tut-an-Geek

SuperFan!
Member # 1234

Icon 1 posted June 07, 2004 12:19      Profile for Tut-an-Geek   Author's Homepage     Send New Private Message       Edit/Delete Post   Reply With Quote 
OK. We have this word problem that's really bugging me. I scanned in the text book:
 -
 -

I can tell that the common ratio is .5, but how do I figure out what the two sequences are and how high it will be?

Thanks [Smile]

Posts: 3764 | Registered: Mar 2002  |  IP: Logged
Tut-an-Geek

SuperFan!
Member # 1234

Icon 1 posted June 07, 2004 13:16      Profile for Tut-an-Geek   Author's Homepage     Send New Private Message       Edit/Delete Post   Reply With Quote 
Hmmm... A little PHP helped [Wink] http://stonewallcs.com/~jon/geoma.php?years=10&precision=10 :-D
Posts: 3764 | Registered: Mar 2002  |  IP: Logged
quantumfluff
BlabberMouth, a Blabber Odyssey
Member # 450

Member Rated:
5
Icon 1 posted June 07, 2004 13:46      Profile for quantumfluff     Send New Private Message       Edit/Delete Post   Reply With Quote 
The series are
2 + 1/2 + 1/8 + 1/ 32
and
sqrt(1/2) + sqrt(1/8) + sqrt(1/32) ...
My terminology may be rusty, but it looks like the common ratio to each is 1/4

The height will appoarch the sum of the limits of the two series. (8/3 and sqrt(2) - I think)
The width is 2(height - 2)
Length of each brand aproaches 0
Sum of lengths of branches is a constant 2

Posts: 2902 | From: 5 to 15 meters above sea level | Registered: Jun 2000  |  IP: Logged
The Famous Druid

Gold Hearted SuperFan!
Member # 1769

Member Rated:
4
Icon 1 posted June 07, 2004 14:59      Profile for The Famous Druid     Send New Private Message       Edit/Delete Post   Reply With Quote 
Sorry QF, you got that last one wrong.

Each term in the series adds 2 to the total length of the branches (i.e. 2 metres of branch grow each year), so the total legth is 2n, and the total length approaches infinity as n approaches infinity.

--------------------
If you watch 'The History Of NASA' backwards, it's about a space agency that has no manned spaceflight capability, then does low-orbit flights, then lands on the Moon.

Posts: 10702 | From: Melbourne, Australia | Registered: Oct 2002  |  IP: Logged
GMx

Solid Nitrozanium SuperFan!
Member # 1523

Member Rated:
4
Icon 1 posted June 07, 2004 15:08      Profile for GMx     Send New Private Message       Edit/Delete Post   Reply With Quote 
You could always use my answer to all word problems: "Who cares?" [Wink]
Posts: 5855 | From: S-4, Area 51 | Registered: Jul 2002  |  IP: Logged
quantumfluff
BlabberMouth, a Blabber Odyssey
Member # 450

Member Rated:
5
Icon 1 posted June 07, 2004 19:07      Profile for quantumfluff     Send New Private Message       Edit/Delete Post   Reply With Quote 
quote:
Originally posted by The Famous Druid:
Sorry QF, you got that last one wrong.
Each term in the series adds 2 to the total length of the branches

Duh! I didn't read the question right. At each year the length of the sum of the *new* branches is 2. I decided they meant that rather than the total.

Did my series sums turn out right? It's been a while (like 25 years) since I've done this stuff.

Posts: 2902 | From: 5 to 15 meters above sea level | Registered: Jun 2000  |  IP: Logged
Tut-an-Geek

SuperFan!
Member # 1234

Icon 1 posted June 07, 2004 19:08      Profile for Tut-an-Geek   Author's Homepage     Send New Private Message       Edit/Delete Post   Reply With Quote 
quote:
Originally posted by The Famous Druid:
Sorry QF, you got that last one wrong.

Each term in the series adds 2 to the total length of the branches (i.e. 2 metres of branch grow each year), so the total legth is 2n, and the total length approaches infinity as n approaches infinity.

But width and height have limits. (height's being width's + 2). For no particular reason I just calculated what the width would be in the 2000th year with 1000 point precision. [Wink]

1.60947570824873003253445914947313205237978125025129871545111982532715498564140469 25669249182184277151566758974872748646832832240372338248084294143313999572209421 48443951670395170533300334101854707047646739706647737313516356397908009819011612 42725946573970155282032287247621430055984173575199683427199312483559769755453921 97604137435055682633698305001918399744865570501468916879046742362497356056658981 06924599980466003210020362685193544302831882045661957945747720385642074397779142 00867707904599149149019233950990749966514361455561361904573734312164805142905699 16103771379785102480150990298010572534413756866407319585986197540312435956480567 33526426272083051487158789106046461913397924523366242233196543176756241573249801 35919827309022715998597353943267799970635153271158411441070683240540717963606509 24556191646167779732394572311118832150952303150153600009867423779764487841552091 01737799496047762349 meters :-D

Posts: 3764 | Registered: Mar 2002  |  IP: Logged
quantumfluff
BlabberMouth, a Blabber Odyssey
Member # 450

Member Rated:
5
Icon 1 posted June 07, 2004 19:14      Profile for quantumfluff     Send New Private Message       Edit/Delete Post   Reply With Quote 
But the question asked the total length of all the branches. The width and hieght do approach a limit, but the *path* length does not. I think that's what makes this a fractal curve.
Posts: 2902 | From: 5 to 15 meters above sea level | Registered: Jun 2000  |  IP: Logged
The Famous Druid

Gold Hearted SuperFan!
Member # 1769

Member Rated:
4
Icon 1 posted June 07, 2004 19:14      Profile for The Famous Druid     Send New Private Message       Edit/Delete Post   Reply With Quote 
Which is suspiciously close to ln(5)

--------------------
If you watch 'The History Of NASA' backwards, it's about a space agency that has no manned spaceflight capability, then does low-orbit flights, then lands on the Moon.

Posts: 10702 | From: Melbourne, Australia | Registered: Oct 2002  |  IP: Logged
Callipygous
BlabberMouth, a Blabber Odyssey
Member # 2071

Member Rated:
4
Icon 1 posted June 08, 2004 04:40      Profile for Callipygous     Send New Private Message       Edit/Delete Post   Reply With Quote 
quote:
Originally posted by GMx:
You could always use my answer to all word problems: "Who cares?" [Wink]

There is a parallel universe inhabited by these maths geeks where I am given to understand that these trees grow in profusion. So this problem is very important to the maths geek forestry team there and the man who supplies ladders to them.

The rest of us need not be over alarmed by this knotty problem.

--------------------
"Knowledge is Power. France is Bacon" - Milton

Posts: 2922 | From: Brighton - UK | Registered: Mar 2003  |  IP: Logged
The Famous Druid

Gold Hearted SuperFan!
Member # 1769

Member Rated:
4
Icon 1 posted June 08, 2004 14:38      Profile for The Famous Druid     Send New Private Message       Edit/Delete Post   Reply With Quote 
*sigh*
It obviously doesn't pay to be too subtle in ones puns. Lets try again....

Tut-an-Geeks answer above is suspiciously close to the natural log of 5

Get it?
Tree ... log ... ?
Looks like /me won't be giving up the day-job any time soon.

--------------------
If you watch 'The History Of NASA' backwards, it's about a space agency that has no manned spaceflight capability, then does low-orbit flights, then lands on the Moon.

Posts: 10702 | From: Melbourne, Australia | Registered: Oct 2002  |  IP: Logged
Cap'n Vic

Member # 1477

Icon 10 posted June 08, 2004 15:17      Profile for Cap'n Vic     Send New Private Message       Edit/Delete Post   Reply With Quote 
You could always branch out into another area!

Tree...log...branch

Posts: 5471 | From: One of the drones from sector 7G | Registered: Jun 2002  |  IP: Logged
GMx

Solid Nitrozanium SuperFan!
Member # 1523

Member Rated:
4
Icon 12 posted June 08, 2004 15:23      Profile for GMx     Send New Private Message       Edit/Delete Post   Reply With Quote 
He obviously needs to get to the root of the problem. [Big Grin]
Posts: 5855 | From: S-4, Area 51 | Registered: Jul 2002  |  IP: Logged
Cap'n Vic

Member # 1477

Icon 10 posted June 08, 2004 16:20      Profile for Cap'n Vic     Send New Private Message       Edit/Delete Post   Reply With Quote 
It could be genetic. The apple doesn't fall far from the tree.....
Posts: 5471 | From: One of the drones from sector 7G | Registered: Jun 2002  |  IP: Logged
The Famous Druid

Gold Hearted SuperFan!
Member # 1769

Member Rated:
4
Icon 1 posted June 08, 2004 16:43      Profile for The Famous Druid     Send New Private Message       Edit/Delete Post   Reply With Quote 
Awww, leaf me alone will you !

--------------------
If you watch 'The History Of NASA' backwards, it's about a space agency that has no manned spaceflight capability, then does low-orbit flights, then lands on the Moon.

Posts: 10702 | From: Melbourne, Australia | Registered: Oct 2002  |  IP: Logged
dragonman97

SuperFan!
Member # 780

Member Rated:
4
Icon 1 posted June 08, 2004 16:43      Profile for dragonman97   Author's Homepage     Send New Private Message       Edit/Delete Post   Reply With Quote 
Which apple - the one that caused original sin?

--------------------
There are three things you can be sure of in life: Death, taxes, and reading about fake illnesses online...

Posts: 9345 | From: Westchester County, New York | Registered: May 2001  |  IP: Logged
Ivan
Alpha Geek
Member # 2622

Member Rated:
3
Icon 1 posted June 08, 2004 19:44      Profile for Ivan   Author's Homepage     Send New Private Message       Edit/Delete Post   Reply With Quote 
Watch it DMan, you're barking up the wrong tree by raising that topic =P
Posts: 269 | From: North Carolina | Registered: Mar 2004  |  IP: Logged
dragonman97

SuperFan!
Member # 780

Member Rated:
4
Icon 1 posted June 08, 2004 20:16      Profile for dragonman97   Author's Homepage     Send New Private Message       Edit/Delete Post   Reply With Quote 
Ivan: Hmm? I'm confused, 'cos I was just making a frivolous post.

*sigh* I dream of using vi as my text box editor :-/.

--------------------
There are three things you can be sure of in life: Death, taxes, and reading about fake illnesses online...

Posts: 9345 | From: Westchester County, New York | Registered: May 2001  |  IP: Logged
The Famous Druid

Gold Hearted SuperFan!
Member # 1769

Member Rated:
4
Icon 1 posted June 08, 2004 20:23      Profile for The Famous Druid     Send New Private Message       Edit/Delete Post   Reply With Quote 
quote:
Originally posted by dragonman97:
Ivan: Hmm? I'm confused, 'cos I was just making a frivolous post.

*sigh* I dream of using vi as my text box editor :-/.

I'm going to go out on a limb here and guess that his attack on you was just an excuse to make a pun.

--------------------
If you watch 'The History Of NASA' backwards, it's about a space agency that has no manned spaceflight capability, then does low-orbit flights, then lands on the Moon.

Posts: 10702 | From: Melbourne, Australia | Registered: Oct 2002  |  IP: Logged


All times are Eastern Time  
Post New Topic  New Poll  Post A Reply Close Topic    Move Topic    Delete Topic next oldest topic   next newest topic
 - Printer-friendly view of this topic
Hop To:

Contact Us | Geek Culture Home Page

© 2018 Geek Culture

Powered by Infopop Corporation
UBB.classicTM 6.4.0



homeGeek CultureWebstoreeCards!Forums!Joy of Tech!AY2K!webcam