# Wish me luck!

#### theman

##### macrumors 6502a
Original poster
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.

#### Jaffa Cake

##### macrumors Core
directional derivatives, gradients, level curves, 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...
That all means nothing to me.

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

#### theman

##### macrumors 6502a
Original poster
ahh, you do know what areas and volumes are. right?

#### Jaffa Cake

##### macrumors Core
ahh, you do know what areas and volumes are. right?
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.

#### XIII

##### macrumors 68040
Areas are the rectangular bits painted in front of the goals on a football pitch, and volumes are what DVDs come in?
Phew. At least you know those ones.

#### theman

##### macrumors 6502a
Original poster
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.
hey, i didn't even think of either of those definitions!

#### gkarris

##### macrumors G3
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

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

#### Doctor Q

Staff member
Now if only I could get off of macrumors and start studying!
Math is much more fun than MacRumors!

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

#### tracetritt

##### macrumors member
Of course, talking about math at MacRumors is more fun than either alone!!
Math Rumors anyone?

#### Doctor Q

Staff member
Math Rumors anyone?
Page 1 news story...
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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.​

#### theman

##### macrumors 6502a
Original poster
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

#### Jaffa Cake

##### macrumors Core
There were a couple of really hard questions... Stupid 3D surfaces and volumes.
Volumes? I hope you remembered about those DVDs.

Fingers crossed for a good result.

#### ZeratulsAvenger

##### macrumors newbie
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.

#### Memeryle.12345

##### macrumors newbie
Just study and study until you worn-out. Anyway you will see what you did after you have passed.

#### theman

##### macrumors 6502a
Original poster
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.