Math question

Gargamel · 04-14-12, 08:41 PM

Bah

Math is fun. Dunno what you guys are crying about.

Sailor Steve · 04-14-12, 09:09 PM

I'm crying because it hurts just to look at it.

My older daughter is a math genius. I'm a math idiot. I can never figure out manual targetting. I'm real good with simple arithmetic, but as soon as there are letters involved I'm lost. This is funny because I'm pretty good at letters too. I guess it's like politics and religion - numbers and letters don't mix for me.

Platapus · 04-14-12, 09:32 PM

Math is exactly like a language. If you don't use it you lose it.

I have forgotten so much about my maths.

Seth8530 · 04-14-12, 10:06 PM

I miss the days when my math was just linear equations ) : Today, I actually ended up spending four hours worth of my time, and 11 pages of paper solving second order differential equations for my Differential equations course today... Hell of a way to spend a Saturday /:

U570 · 04-14-12, 10:10 PM

Quote:

Originally Posted by Seth8530

I miss the days when my math was just linear equations ) : Today, I actually ended up spending four hours worth of my time, and 11 pages of paper solving second order differential equations for my Differential equations course today... Hell of a way to spend a Saturday /:

This and doing 3 pages per question on curve sketching are about par. Guess what I have to do for school

Seth8530 · 04-14-12, 10:11 PM

hehe indeed, Damn springs, and damn dampening coefs, One of them buger s did take me three pages to work out.. First time in a long time mathematics has taken that much work from me, its usually the engineering courses.

Gargamel · 04-14-12, 10:35 PM

http://i.imgur.com/zoawk.jpg

Warning, bad language.

THE_MASK · 04-15-12, 03:11 AM

Quote:

Originally Posted by Sailor Steve

I'm crying because it hurts just to look at it.

My older daughter is a math genius. I'm a math idiot. I can never figure out manual targetting. I'm real good with simple arithmetic, but as soon as there are letters involved I'm lost. This is funny because I'm pretty good at letters too. I guess it's like politics and religion - numbers and letters don't mix for me.

People keep asking me what manual targeting mods i use and how do i do it . I dont reply and hope they go away because i havnt got a bloody clue

Jimbuna · 04-15-12, 07:27 AM

Quote:

Originally Posted by sober

People keep asking me what manual targeting mods i use and how do i do it . I dont reply and hope they go away because i havnt got a bloody clue

LOL

Onkel Neal · 04-17-12, 10:57 AM

Quote:

Originally Posted by privateer

I saw Math Question and STILL clicked on the topic!!

My head hurts!!

Lol,

Quote:

Originally Posted by PeriscopeDepth

Hey Neal,

Both:
http://www.khanacademy.org/#browse
http://patrickjmt.com/

are fantastic resources. Made my courses much more bearable for me.

PD

Yes, thanks, PD, I have been using Khan like crazy for the last three weeks, that really helps.

Quote:

Originally Posted by Gargamel

Bah

Math is fun. Dunno what you guys are crying about.

Well, some people think playing with model trains is fun and collecting antiques is fun, I think it's boring as hell. The only math I enjoy is that to which I can apply practical applications, like manual torpedo targeting, probablities, and percentages. The rest is abstract fluff that only engineers need to know.

And math teachers

My goal is to get up to speed and help students by identifying with them and finding ways to make math interesting and not so daunting. "Are you intimidated by advanced math concepts? Me too! But I can show you ways to learn it and become proficient without breaking your brain". Of course, some brain-breaking will be necessary, but we can ease into it.

Quote:

Originally Posted by Sailor Steve

I'm crying because it hurts just to look at it.

My older daughter is a math genius. I'm a math idiot. I can never figure out manual targetting. I'm real good with simple arithmetic, but as soon as there are letters involved I'm lost. This is funny because I'm pretty good at letters too. I guess it's like politics and religion - numbers and letters don't mix for me.

I can perform math at the college level without too much difficulty, but like Plat says, you don't use it, you lose it. And I never used it in real life.

I cannot wait to attend a party and while the guests are discussing literature, philosphy, politics, history, travels... etc, I'll spring the delightful subject of recursive expansions on them. How they will love me!

Onkel Neal · 04-17-12, 12:16 PM

@ Gargamel

While doing the exercises at Khan Academy, finding the slope of a line, there was one example where the text shows

m = y1-y2/x1-x2

Now, that's different from everything else they show, and everything else I can find on the web, where slope is clearly defined as

m = y2-y1/x2-x1

That's the correct definition, right? There's no y1-y2 version is there? Or does it not make a difference?

Kaleun · 04-17-12, 12:21 PM

I'm an IT engineer now - but i like Maths (as we call it in the UK), i have a degree (Bsc) in the pesky subject!

Diopos · 04-17-12, 12:26 PM

Quote:

Originally Posted by Neal Stevens

@ Gargamel

While doing the exercises at Khan Academy, finding the slope of a line, there was one example where the text shows

m = y1-y2/x1-x2

Now, that's different from everything else they show, and everything else I can find on the web, where slope is clearly defined as

m = y2-y1/x2-x1

That's the correct definition, right? There's no y1-y2 version is there? Cause that changes the sign...

The expressions are equivalent:
m = y1-y2/x1-x2=[(y1-y2)]/[(x1-x2)]=[-(y2-y1)]/[-(x2-x1)]= (y2-y1)/(x2-x1)

U570 · 04-17-12, 06:33 PM

Quote:

Originally Posted by Neal Stevens

@ Gargamel

While doing the exercises at Khan Academy, finding the slope of a line, there was one example where the text shows

m = y1-y2/x1-x2

Now, that's different from everything else they show, and everything else I can find on the web, where slope is clearly defined as

m = y2-y1/x2-x1

That's the correct definition, right? There's no y1-y2 version is there? Or does it not make a difference?

just a heads up about the y2-y1 and x2-x1; they are the co-ordinates of the line you are trying to find the gradient of. Just imagine the line goes through (0,0) and (3,7). The co-ordinates are as such;
y1=0, y2=7, x1=0, x2=3
sub them in accordingly; and you get
m=7-0/3-0
m=7/3
Does that help with it?

Onkel Neal · 04-17-12, 10:05 PM

Quote:

Originally Posted by U570

just a heads up about the y2-y1 and x2-x1; they are the co-ordinates of the line you are trying to find the gradient of. Just imagine the line goes through (0,0) and (3,7). The co-ordinates are as such;
y1=0, y2=7, x1=0, x2=3
sub them in accordingly; and you get
m=7-0/3-0
m=7/3
Does that help with it?

Yeah, thanks, I know that much, I was not sure about the sequence.

04-14-12, 08:41 PM	#1
Gargamel Lucky Sailor Join Date: Oct 2010 Location: Rome Posts: 4,273 Downloads: 81 Uploads: 0	Bah Math is fun. Dunno what you guys are crying about. __________________ Luck is a residue of Design.

04-14-12, 09:09 PM	#2
Sailor Steve Eternal Patrol Join Date: Nov 2002 Location: High in the mountains of Utah Posts: 50,369 Downloads: 745 Uploads: 249	I'm crying because it hurts just to look at it. My older daughter is a math genius. I'm a math idiot. I can never figure out manual targetting. I'm real good with simple arithmetic, but as soon as there are letters involved I'm lost. This is funny because I'm pretty good at letters too. I guess it's like politics and religion - numbers and letters don't mix for me. __________________ “Never do anything you can't take back.” —Rocky Russo

04-14-12, 09:32 PM	#3
Platapus Fleet Admiral Join Date: Oct 2006 Posts: 19,384 Downloads: 63 Uploads: 0	Math is exactly like a language. If you don't use it you lose it. I have forgotten so much about my maths. __________________ abusus non tollit usum - A right should NOT be withheld from people on the basis that some tend to abuse that right.

04-14-12, 10:06 PM	#4
Seth8530 Captain Join Date: Jan 2007 Location: Tennessee Posts: 546 Downloads: 17 Uploads: 0	I miss the days when my math was just linear equations ) : Today, I actually ended up spending four hours worth of my time, and 11 pages of paper solving second order differential equations for my Differential equations course today... Hell of a way to spend a Saturday /: __________________

04-14-12, 10:11 PM	#6
Seth8530 Captain Join Date: Jan 2007 Location: Tennessee Posts: 546 Downloads: 17 Uploads: 0	hehe indeed, Damn springs, and damn dampening coefs, One of them buger s did take me three pages to work out.. First time in a long time mathematics has taken that much work from me, its usually the engineering courses. __________________

04-14-12, 10:35 PM	#7
Gargamel Lucky Sailor Join Date: Oct 2010 Location: Rome Posts: 4,273 Downloads: 81 Uploads: 0	http://i.imgur.com/zoawk.jpg Warning, bad language. __________________ Luck is a residue of Design.

04-17-12, 12:16 PM	#11
Onkel Neal Born to Run Silent Join Date: Jan 1997 Location: Cougar Trap, Texas Posts: 21,385 Downloads: 541 Uploads: 224	@ Gargamel While doing the exercises at Khan Academy, finding the slope of a line, there was one example where the text shows m = y1-y2/x1-x2 Now, that's different from everything else they show, and everything else I can find on the web, where slope is clearly defined as m = y2-y1/x2-x1 That's the correct definition, right? There's no y1-y2 version is there? Or does it not make a difference?

04-17-12, 12:21 PM	#12
Kaleun Chief Join Date: Jul 2003 Posts: 329 Downloads: 266 Uploads: 0	I'm an IT engineer now - but i like Maths (as we call it in the UK), i have a degree (Bsc) in the pesky subject!