Mathematics

Sam's Crow · 11-29-2008, 08:51 AM

Well we have threads for foreign languages, why can't we have one for mathematics? This is pretty much a thread about anything to do with maths.

Ready... Set... Go!

By the way, sorry I've been offline for so long.

ohboy · 11-29-2008, 02:43 PM

Quote:

Originally Posted by Sam's Crow

Well we have threads for foreign languages, why can't we have one for mathematics? This is pretty much a thread about anything to do with maths.

Ready... Set... Go!

By the way, sorry I've been offline for so long.

That's alright. The first Round Robin was finished, so I hope you can contribute to the second one.

As for mathematics, I can't really think of anything. The only smart mathematical theory I know is the Quatratic Formula:

-B +/- the square root of B(squared) - 4AC divided by 2A.

Sam's Crow · 11-29-2008, 03:51 PM

It doesn't have to be a "smart Mathematical theory, it's just a discussion about anything to do do with Mathematics.

jassian · 11-29-2008, 04:12 PM

cool I'm in. I'm rusty but I used to be quite good... back when I was trying to become an engineer

Sam's Crow · 11-30-2008, 01:33 AM

Oh yeah, I'm part of this "Maths Challenge" thing in school. I might get put on the "Maths Team" and compete against other schools in Mathematics. Cool huh?

jassian · 11-30-2008, 01:47 AM

Quote:

Originally Posted by Sam's Crow

Oh yeah, I'm part of this "Maths Challenge" thing in school. I might get put on the "Maths Team" and compete against other schools in Mathematics. Cool huh?

Very cool.

I did a competition for my final assesment in math... well I only had to do the first round and after passing it and writing my paper about it, I quit the competition for time reasons. So I never found out how far I would have gotten.

So what shall we talk about?

How do people feel about the square root of -1 not being defined?

ohboy · 11-30-2008, 02:20 AM

When I took algebra, we always made the square root of -1 "i". In that situation, the square root of a number such as -16 would equal 4(i), or something to that effect. Since there's no way to solve for a negative square root, I'd say it would be pretty hard to define.

jassian · 11-30-2008, 04:03 AM

Sorry,
it's the oposite.

i square is -1
but the square root of -1 will remain undefined.

Which is a trap I stepped into with much gusto over the years,

The things you can prove with that mistake, it's hillarious.

ohboy · 11-30-2008, 12:10 PM

Luckily, I never had to try and prove anything with that mistake, or else I would probably have learned that lesson like you did.

Errowyn · 12-07-2008, 04:29 PM

I remember the rule of -1. I flunked math both in High School and College...along with half the class.

jassian · 12-07-2008, 06:58 PM

Quote:

Originally Posted by Errowyn

I remember the rule of -1. I flunked math both in High School and College...along with half the class.

I had really good, motivational teachers most of the time, that makes all the difference.

MO · 12-07-2008, 07:28 PM

This is how good I am at Math.

ohboy · 12-07-2008, 08:33 PM

That is hilarious. To be honest, I would have no idea how to solve that. Nice save; you did answer the question correctly. Was it that on a test?

MO · 12-07-2008, 09:59 PM

Actually, I saw the image on a website, remembered it, and posted the link here. I wish I had done that in my Math class, though, just to see what the reaction would be.

jassian · 12-08-2008, 01:07 AM

it's cool! *L*

and technically correct.

ris768 · 12-08-2008, 08:00 AM

How sad I know the answer.

x=5cm

Formula is
x(squared) = a(squared) + b(squared)
x(squared) = (4x4) + (3x3)
x(squared) = 16 + 9
x(squared) = 25
x = square root of 25
x= 5

jassian · 12-08-2008, 09:40 AM

i may even remember the the formula for non-right angles if I concentrate, how sad is that? *L*

something like:
c²= a² - 2ab COS(α) + b²

probably wrong though, so someone please correct me

.
In any case the Cos of 90 degrees is zero, that's
why it simplifies to c² = a² + b²

ohboy · 12-08-2008, 12:34 PM

(Smiles and nods)

jassian · 12-08-2008, 06:46 PM

did I get it right?

ohboy · 12-08-2008, 08:12 PM

I don't know. I'm smiling and and nodding because I don't know what your doing.

jassian · 12-08-2008, 09:07 PM

ah

Ok.
*smiles and nods too, pretending she knows what she's doing*

Ziggy · 12-11-2008, 04:06 PM

I have this friend who is a Maths GENIUS. And I don't just mean she's really clever/ good at Maths, she's an actual genius (though of course nowhere near Sam's level

).

Sam's Crow · 12-13-2008, 11:59 AM

That's excellent.

Ziggy · 12-13-2008, 02:39 PM

xkcd.com has loads of these.

ohboy · 12-15-2008, 08:26 PM

Sadly, I don't even know what the subject of physics is...

But I must say, math must be more important than school children think when they moan "why do I have to take this? I'll never use algebra."

11-29-2008, 08:51 AM	#1
Sam's Crow Assistant to Gooshie Join Date: Jun 2008 Location: Liverpool, England Posts: 488	Mathematics Well we have threads for foreign languages, why can't we have one for mathematics? This is pretty much a thread about anything to do with maths. Ready... Set... Go! By the way, sorry I've been offline for so long. __________________ It's Monday morning again, Or still? It's hard to tell the difference.

11-29-2008, 03:51 PM	#3
Sam's Crow Assistant to Gooshie Join Date: Jun 2008 Location: Liverpool, England Posts: 488	It doesn't have to be a "smart Mathematical theory, it's just a discussion about anything to do do with Mathematics. __________________ It's Monday morning again, Or still? It's hard to tell the difference.

11-29-2008, 04:12 PM	#4
jassian Project Observer Join Date: Oct 2008 Location: Germany Posts: 925	cool I'm in. I'm rusty but I used to be quite good... back when I was trying to become an engineer __________________

11-30-2008, 01:33 AM	#5
Sam's Crow Assistant to Gooshie Join Date: Jun 2008 Location: Liverpool, England Posts: 488	Oh yeah, I'm part of this "Maths Challenge" thing in school. I might get put on the "Maths Team" and compete against other schools in Mathematics. Cool huh? __________________ It's Monday morning again, Or still? It's hard to tell the difference.

11-30-2008, 02:20 AM	#7
ohboy Junior Leaper Join Date: May 2008 Location: Northern California Posts: 1,383	When I took algebra, we always made the square root of -1 "i". In that situation, the square root of a number such as -16 would equal 4(i), or something to that effect. Since there's no way to solve for a negative square root, I'd say it would be pretty hard to define. __________________ "Do not forget to entertain strangers, for by doing some have unwittingly entertained angels." Dr. Wily is a registered trademark of Capcom, and I don't own the rights to it in anyway, nor do I profit from the avatar.

11-30-2008, 04:03 AM	#8
jassian Project Observer Join Date: Oct 2008 Location: Germany Posts: 925	Sorry, it's the oposite. i square is -1 but the square root of -1 will remain undefined. Which is a trap I stepped into with much gusto over the years, The things you can prove with that mistake, it's hillarious. __________________

11-30-2008, 12:10 PM	#9
ohboy Junior Leaper Join Date: May 2008 Location: Northern California Posts: 1,383	Luckily, I never had to try and prove anything with that mistake, or else I would probably have learned that lesson like you did. __________________ "Do not forget to entertain strangers, for by doing some have unwittingly entertained angels." Dr. Wily is a registered trademark of Capcom, and I don't own the rights to it in anyway, nor do I profit from the avatar.

12-07-2008, 04:29 PM	#10
Errowyn Observer's Aid Join Date: Sep 2008 Location: California Posts: 526	I remember the rule of -1. I flunked math both in High School and College...along with half the class. __________________ I was a sailor. I was born upon the tide and with the sea I did abide. I sailed a schooner round the Horn to Mexico I went aloft and furled the mainsail in a blow. And when the yards broke off they said that I got killed. But I am living still. --The Highway Man

12-07-2008, 07:28 PM	#12
MO Pulse Communications Technician Join Date: Apr 2008 Location: In a tin can in the countryside Posts: 310	This is how good I am at Math. __________________ "What's left after you go is the good you've left behind." -- Robert Zubrin, American aerospace engineer

12-07-2008, 08:33 PM	#13
ohboy Junior Leaper Join Date: May 2008 Location: Northern California Posts: 1,383	That is hilarious. To be honest, I would have no idea how to solve that. Nice save; you did answer the question correctly. Was it that on a test? __________________ "Do not forget to entertain strangers, for by doing some have unwittingly entertained angels." Dr. Wily is a registered trademark of Capcom, and I don't own the rights to it in anyway, nor do I profit from the avatar.

12-07-2008, 09:59 PM	#14
MO Pulse Communications Technician Join Date: Apr 2008 Location: In a tin can in the countryside Posts: 310	Actually, I saw the image on a website, remembered it, and posted the link here. I wish I had done that in my Math class, though, just to see what the reaction would be. __________________ "What's left after you go is the good you've left behind." -- Robert Zubrin, American aerospace engineer

12-08-2008, 01:07 AM	#15
jassian Project Observer Join Date: Oct 2008 Location: Germany Posts: 925	it's cool! L and technically correct. __________________

12-08-2008, 08:00 AM	#16
ris768 Pulse Communications Technician Join Date: Sep 2006 Location: Sydney, Australia Posts: 310	How sad I know the answer. x=5cm Formula is x(squared) = a(squared) + b(squared) x(squared) = (4x4) + (3x3) x(squared) = 16 + 9 x(squared) = 25 x = square root of 25 x= 5 __________________

12-08-2008, 09:40 AM	#17
jassian Project Observer Join Date: Oct 2008 Location: Germany Posts: 925	i may even remember the the formula for non-right angles if I concentrate, how sad is that? L something like: c²= a² - 2ab COS(α) + b² probably wrong though, so someone please correct me . In any case the Cos of 90 degrees is zero, that's why it simplifies to c² = a² + b² __________________

12-08-2008, 12:34 PM	#18
ohboy Junior Leaper Join Date: May 2008 Location: Northern California Posts: 1,383	(Smiles and nods) __________________ "Do not forget to entertain strangers, for by doing some have unwittingly entertained angels." Dr. Wily is a registered trademark of Capcom, and I don't own the rights to it in anyway, nor do I profit from the avatar.

12-08-2008, 06:46 PM	#19
jassian Project Observer Join Date: Oct 2008 Location: Germany Posts: 925	did I get it right? __________________

12-08-2008, 08:12 PM	#20
ohboy Junior Leaper Join Date: May 2008 Location: Northern California Posts: 1,383	I don't know. I'm smiling and and nodding because I don't know what your doing. __________________ "Do not forget to entertain strangers, for by doing some have unwittingly entertained angels." Dr. Wily is a registered trademark of Capcom, and I don't own the rights to it in anyway, nor do I profit from the avatar.

12-08-2008, 09:07 PM	#21
jassian Project Observer Join Date: Oct 2008 Location: Germany Posts: 925	ah Ok. smiles and nods too, pretending she knows what she's doing __________________

12-11-2008, 04:06 PM	#22
Ziggy Control Room Technician Join Date: Apr 2007 Location: England Posts: 156	I have this friend who is a Maths GENIUS. And I don't just mean she's really clever/ good at Maths, she's an actual genius (though of course nowhere near Sam's level ). __________________ "With a million gigabyte capacity I'm quite capable of rubbing my tummy, patting my head and doing a trillion floating point operations at once."

12-13-2008, 11:59 AM	#23
Sam's Crow Assistant to Gooshie Join Date: Jun 2008 Location: Liverpool, England Posts: 488	That's excellent. __________________ It's Monday morning again, Or still? It's hard to tell the difference.

12-13-2008, 02:39 PM	#24
Ziggy Control Room Technician Join Date: Apr 2007 Location: England Posts: 156	xkcd.com has loads of these. __________________ "With a million gigabyte capacity I'm quite capable of rubbing my tummy, patting my head and doing a trillion floating point operations at once."

12-15-2008, 08:26 PM	#25
ohboy Junior Leaper Join Date: May 2008 Location: Northern California Posts: 1,383	Sadly, I don't even know what the subject of physics is... But I must say, math must be more important than school children think when they moan "why do I have to take this? I'll never use algebra." __________________ "Do not forget to entertain strangers, for by doing some have unwittingly entertained angels." Dr. Wily is a registered trademark of Capcom, and I don't own the rights to it in anyway, nor do I profit from the avatar.