The DW Math Thread

Tearle - Dreamweaver

Tearle - Dreamweaver wrote: »

Uhm, the northwest ordinance its like for data and timing things I guess? I was absent when my teacher taught it but it's a box like matrix thingy with more boxes and there's way too many numbers ;-;

does that make sense?

I'll see if I can draw it...


Epic paint skills... sorry for it sucking :c

;______; plox?

Decus - Dreamweaver

Okeano - Harshlands wrote: »

Math?

truekossy wrote: »

Indeed

All of those are so very wrong, it hurts... Really... Shall I explain why? I am pretty sure I don't have to...

What the hell, I will anyway! Here we go, kiddies!

1. We know the process never enters the perimeter of the circle, so we can conclude that the final perimeter will have to be larger than the actual circumference.

2. Division by zero... that was obvious...

3. Arcsin is a multivalued function and you cannot say definitively that x=arcsin(0) is true

4. Just because their squares are equal is no good reason to believe the numbers themselves are equal. Come on now, w're out of middle school, right?

After all (-3)^2 = (3)^2, but -3 =/= 3 ^.^

5. That check actually says e^i*pi not e^2*pi. You can deduce from my siggy to what the former is equivalent. Thus the check is actually for $0.002

Tearle - Dreamweaver wrote: »

;______; plox?

Dear, I haven't a clue what the problem is about. Try scanning a picture or something cause I can't do much with that description =/

grimreaperhc

Veonita - Dreamweaver wrote: »

The answer is 42.

This is so damn right b:laughb:chuckle

Tearle - Dreamweaver

Ok ;_; ill try again. I even brought my math book home this weekend Dx oh god the inhumanity!

ok northwest ordinance also known as northwest corner rule is --

"based on geometry of a table that is involved and does not look at costs in cells of the table, until trying to find optimal solution. the algorithm carries out the following procedure until exactly one cells remains in the tableau..."

You're gonna have to suffer through bad webcam shots because I couldn't get to a scanner at school ;-; im sorry, it's the best I could come up with on such short time.

Decus - Dreamweaver

Tearle - Dreamweaver wrote: »

Ok ;_; ill try again. I even brought my math book home this weekend Dx oh god the inhumanity!

ok northwest ordinance also known as northwest corner rule is --

"based on geometry of a table that is involved and does not look at costs in cells of the table, until trying to find optimal solution. the algorithm carries out the following procedure until exactly one cells remains in the tableau..."

You're gonna have to suffer through bad webcam shots because I couldn't get to a scanner at school ;-; im sorry, it's the best I could come up with on such short time.

Just for you, Tearle, I looked this up in considerable detail once I had a better idea what it was. (FYI: Had you mentioned "northwest corner rule" then I could have found this sooner ;p)

This is apparently some form of geometric optimization given some constraints. (Meaning, we're looking for the ideal way to solve this visually given a set of limits.)

So you start in the upper left and you put a number down that satisfies the demand for that column (bottom number outside the matrix) without going over the supply (number on the right outside the matrix). You can only put down as much supply as you have, no more than that. (Meaning, if my demand is 7 and my supply is 4, then I put down 4. If my supply is 10 and my demand is 7, then I put down 7.)

If you still have supply "leftover" you move to the next column on the same row and try to satisfy the demand with whatever supply you had leftover. (So, take the example we just said with supply-10 and demand-7. Once I finished the first box, I have 3 supply leftover once I do that first box so I move over and have 3 supply to put into that box depending on what the demand is.) Either way, when you run out of the supply for the first row, you drop down to the second row. Then, from the box you start on, you do the same procedure. Try to satisfy demand given whatever supply you have. If you run out, drop down, if you have leftover, move over...

I have a linkie for you that gives an example of the process. Don't worry so much for the explanation, it's the matrix on slide 5 that you want to look at.

If that doesn't make any sense, tell Tepp-kun to message me and I'll hop on vent.

Cheers!

Xarathox - Dreamweaver

Hey dec, how good are you with Quantum Mathematics? o.o

Decus - Dreamweaver

Xarathox - Dreamweaver wrote: »

Hey dec, how good are you with Quantum Mathematics? o.o

I am versed in everything mathematical "up to" multivariate calculus with some linear algebra thrown in for fun. Admittedly, that's a somewhat limited scope but calculus and differential equations were what interested me. That allows me to have a working understanding of elementary physics (i.e. classical mechanics) and the multivariable coursework helped to build a foundation for some electromagnetism and fluid dynamics. After that, frankly, I lost interest.

Why do you ask?

Xarathox - Dreamweaver

Decus - Dreamweaver wrote: »

I am versed in everything mathematical "up to" multivariate calculus with some linear algebra thrown in for fun. Admittedly, that's a somewhat limited scope but calculus and differential equations were what interested me. That allows me to have a working understanding of elementary physics (i.e. classical mechanics) and the multivariable coursework helped to build a foundation for some electromagnetism and fluid dynamics. After that, frankly, I lost interest.

Why do you ask?

Well, mostly just trying to figure out how a flat space can uniformly expand in all directions. I'll see if I can compile some links to show what I mean. Gonna have to do some digging again. >.<

I've fallen behind on physics, so got some catching up to do.

Tearle - Dreamweaver

Decus - Dreamweaver wrote: »

Just for you, Tearle, I looked this up in considerable detail once I had a better idea what it was. (FYI: Had you mentioned "northwest corner rule" then I could have found this sooner ;p)

Sorry v.v my teacher never called it the corner rule so I wasn't sure which name to use. The explanation did help quite a bit Thank you very much. I managed to finish my extra credit that'll bring my report up a letter grade.

The link wouldn't open for me though, my computer kept saying it was bad- I got the gist of what you were saying from what you said though.

I really really appreciate the help. b:thanks


You have no idea how mean math is to me ;-;

Teppeii - Dreamweaver

Tearle - Dreamweaver wrote: »

Sorry v.v my teacher never called it the corner rule so I wasn't sure which name to use. The explanation did help quite a bit Thank you very much. I managed to finish my extra credit that'll bring my report up a letter grade.

The link wouldn't open for me though, my computer kept saying it was bad- I got the gist of what you were saying from what you said though.

I really really appreciate the help. b:thanks


You have no idea how mean math is to me ;-;

To be honest I'm surprised I haven't even heard of this type of problem. What math class did this come up in? Discrete?

Tearle - Dreamweaver

Yup =o

SerenityMare - Dreamweaver

YESSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSS. :DDDD Thank you thank you thank you! I'm coming here for math homework help! **** afterclass help in school. xD

Teppeii - Dreamweaver

h(x) = f(g(x))

Oh hey there, I hear you like functions. So, I put a function inside of a function. That way you can derive while you derive.b:cute

Azzazin - Dreamweaver

I like rough maths

Sum of the alternating odd numbers -1 to 999, is like.... 501 numbers. The average # is (999- (-1))/2 = 500. So wouldn't sum be 501*500 =, uh... thats where my rough math stops. Lol

250,500 I suppose.

Decus - Dreamweaver

Azzazin - Dreamweaver wrote: »

I like rough maths

Sum of the alternating odd numbers -1 to 999, is like.... 501 numbers. The average # is (999- (-1))/2 = 500. So wouldn't sum be 501*500 =, uh... thats where my rough math stops. Lol

250,500 I suppose.

Nah, cheze got it. If it wasn't alternating, the sum would be ~250,000 (or exactly, I haven't the time at the moment to verify).

Decus - Dreamweaver

That reminds me:

(Sorry for being late!) b:surrender

New week, new problem!

Time to separate the boys from the... ever so slightly older boys. We'll stay fairly easy, for now b:angry

If you can solve it quickly, which many of you will, give others some time to try. Also, google-ing to get the answer and posting it here does nothing, really. No one will think you are cool


I need you to compute this indefinite integral.

Cheers!

Decus - Dreamweaver

Aww, no one wants to ever try? b:sad

BloodyOne - Dreamweaver

i needa learn how 2 math Q.Q

SerenityMare - Dreamweaver

I'm still in highscool. qq

Aracnius - Dreamweaver

the answer is (i almost spelled answer wrong, thank you google chrome)
x=e(squared) to the negative w of 24

Xarathox - Dreamweaver

\o/

Decus - Dreamweaver

Xarathox - Dreamweaver wrote: »

\o/

Hah! Suck it, Lucas! b:cool

Stalker__ - Archosaur

I enjoy solving the 3x3, 4x4, and 5x5 rubik's cubes...does that count as math?

3x3 best time: 53 sec b:pleased
4x4 best time: 7min 12 sec
5x5 best time: 8min 43 sec

(P.S. I'm not asain b:laugh)

Cheze - Lost City

i don't really like calculus, integration by parts ew.

and it's like (-1/2 * x^4 - x^2 - 1) * e^(-x^2)

MageFizban - Lost City

Cheze - Lost City wrote: »

i don't really like calculus, integration by parts ew.

and it's like (-1/2 * x^4 - x^2 - 1) * e^(-x^2)

http://goo.gl/w37GP you forgot the +C
XD

Cheze - Lost City

magefizban - Lost City wrote: »

http://goo.gl/w37gp You Forgot The +c
Xd

Nfu................

MageFizban - Lost City

Cheze - Lost City wrote: »

Nfu................

nfu.jpg

Kswizzled - Dreamweaver

oh haiii there.
just a beeteedubs
spring break is over, so i'll probably be **** this thread when math class starts again and my asian uncle in my calculator fails me again b:shutup

b:surrender

so much win in this forum. YAY for not failing x)

Decus - Dreamweaver

Cheze - Lost City wrote: »

i don't really like calculus, integration by parts ew.

and it's like (-1/2 * x^4 - x^2 - 1) * e^(-x^2)

This will get pretty boring if only Cheze keeps participating

MageFizban - Lost City wrote: »

http://goo.gl/w37GP you forgot the +C
XD

Using an online integrator is no fun. It was easy, for heaven's sake! b:angry

Kswizzled - Dreamweaver wrote: »

oh haiii there.
just a beeteedubs
spring break is over, so i'll probably be **** this thread when math class starts again and my asian uncle in my calculator fails me again b:shutup

b:surrender

so much win in this forum. YAY for not failing x)

Glad to (potentially) be able to help!

People of all races are good at math; and, not all Asians are good at math.

Decus - Dreamweaver

Which, again, reminds me!

New week; new problem! I'll increase the difficulty ever so slightly (but only slightly, heh!) >:o

Without further ado:

Since I was bored with calculus, tell me if this matrix is a singular matrix. If it is not, prove it. If it is, give me a basis for each of the four fundamental subspaces of that matrix.

Have at it, fellow mathies. b:victory