# Wish me luck!

Discussion in 'Community Discussion' started by theman, Nov 5, 2007.

1. ### theman macrumors 6502a

Joined:
Jul 26, 2007
#1
I'm going in for my math midterm tomorrow, it's all about directional derivatives, gradients, level surfaces, minimums/maximums/saddle points -- FxxFyy-Fxy^2<0 (hey, I actually know that one!), double integrals, areas, volumes, triple integrals, areas/volumes of polar functions, and all that fun stuff. Hopefully I don't miss any!

Now if only I could get off of macrumors and start studying! I don't know how to do any of it yet!

I could just start paying attention in class, but that's no fun at all...

Peace.

2. ### Jaffa Cake macrumors Core

Joined:
Aug 1, 2004
Location:
The City of Culture, Englandshire
#2
That all means nothing to me.

But good luck for tomorrow  now get off of here and do some studying!

3. ### theman thread starter macrumors 6502a

Joined:
Jul 26, 2007
#3
ahh, you do know what areas and volumes are. right?

4. ### Jaffa Cake macrumors Core

Joined:
Aug 1, 2004
Location:
The City of Culture, Englandshire
#4
Areas are the rectangular bits painted in front of the goals on a football pitch, and volumes are what DVDs come in?

I went to art college.

5. ### XIII macrumors 68040

Joined:
Aug 15, 2004
Location:
England
#5
Phew. At least you know those ones.

6. ### theman thread starter macrumors 6502a

Joined:
Jul 26, 2007
#6
hey, i didn't even think of either of those definitions!

7. ### gkarris macrumors 604

Joined:
Dec 31, 2004
Location:
"No escape from Reality..."
#7

FxxFyy-Fxy^2<0 = Zzzzzzzzzzzzzz...

### Staff Member

Joined:
Sep 19, 2002
Location:
Los Angeles
#8
Math is much more fun than MacRumors!

Of course, talking about math at MacRumors is more fun than either alone!!

9. ### tracetritt macrumors member

Joined:
Jun 10, 2007
Location:
Northwestern Wisconsin, USA
#9
Math Rumors anyone?

### Staff Member

Joined:
Sep 19, 2002
Location:
Los Angeles
#10
Page 1 news story...
Apple Primed For Big Announcement?

Apple fans have been buzzing with speculation that a new Macintosh-only prime number will be announced by Steve Jobs at a press conference in Cupertino at noon today. Reports that Apple may release the prime number for Windows at a later date are unconfirmed at this time.​

11. ### theman thread starter macrumors 6502a

Joined:
Jul 26, 2007
#11
Ok guys, here's an update. I'm not sure how it went... There were a couple of really hard questions... Stupid 3D surfaces and volumes. Hopefully I got at least 85% (which would most likely be an A...please)

have fun mathing

12. ### Jaffa Cake macrumors Core

Joined:
Aug 1, 2004
Location:
The City of Culture, Englandshire
#12
Volumes? I hope you remembered about those DVDs.

Fingers crossed for a good result.

13. ### ZeratulsAvenger macrumors newbie

Joined:
Apr 16, 2005
#13
My school is on a trimester/quarter system (depending on who you ask), so we have calculus split up into 3 classes, so I can't remember which one it is that you are doing; either way I know I hated triple integrals because they always gave us limits of integration that were functions of x or y or z, and then ask us to rearrange the integrals to get them in such and such order. Glad I am done with it. Tedious and so easy to mess something up.

Are you going to do differential equations? I found that much easier than any calculus class I took, so if you do, you have something to look forward to.

PS-Polar coordinates are still a mystery to me. Plenty of equations in one of my classes are easier to derive while using a polar coordinate system, but past the derivation it always seems like utter nonsense.

14. ### Memeryle.12345 macrumors newbie

Joined:
Nov 9, 2007
#14
Just study and study until you worn-out. Anyway you will see what you did after you have passed.

15. ### theman thread starter macrumors 6502a

Joined:
Jul 26, 2007
#15
ok guys, I got my results yesterday.

I got an 88%, which is pretty good. the highest grade in the class was a 92%

I should have gotten a 93%, but I made 2 REALLY dumb mistakes.... oh well, I can't ALWAYS have the highest grade in the class...

a third of my class got below 50% though... i didn't think it was that hard...

And yeah, to the above poster, the 2 questions i screwed up were polar coodinates, and the triple integral thing where you have to draw 2 pictures and figure out the functions in terms of x,y,z for the boundaries... hard stuff.
Did you learn cylindrical and spherical coordinates? I find this very interesting... makes you think differently.

i am not taking diff eq next semester because i simply don't have time for it, but probably will take it next year.

peace.

### Staff Member

Joined:
Sep 19, 2002
Location:
Los Angeles
#16
Congratulations on your outstanding performance, theman, especially if you really weren't paying attention in class.

Obviously, youtheman!