View Full Version : Bored..Calc anyone?
Shining Knights
2004-04-01, 06:40 PM
It matters not whether you win or lose; what matters is whether I win or lose.
That problem gave me a serious headache just looking at it.
Ganga
2004-04-01, 11:12 PM
what calc class you need to take to atleast know what's talking about man... what you mean by sub-script.
platnum
2004-04-02, 04:36 AM
Subscript is the little number on the bottom right of things like x and y. Looks like the opposite of something squared, or cubed.
Shining Knights
2004-04-02, 04:41 AM
It matters not whether you win or lose; what matters is whether I win or lose.
Raziel
2004-04-02, 05:42 AM
There are most definitely people that know calculus on this forum. But, nobody is interested in doing your homework for you.
BlueCube
2004-04-02, 06:40 AM
The subscript is probably used for coordinates in this case.. like for the standard slope function (x2-x1)/(y2-y1), if I remember correctly..
Jamesadin
2004-04-02, 07:04 AM
I HATE calculus. O_o
Shining Knights
2004-04-02, 12:58 PM
It matters not whether you win or lose; what matters is whether I win or lose.
Penguin
2004-04-02, 03:11 PM
5000 dollars says chruser will reply to this when he sees it.
EX-Mania
2004-04-02, 03:54 PM
Not only that but he will probably get the anwser right :( nerd :)... why the hell do i use smilies? :S:D:P:(:)
Titusfied
2004-04-02, 04:08 PM
What the fuck are you even trying to say there Shinto? Are you expressing y as a function of x, x2, and x3, which is the same function squared of x2 and x3 plus 1? Honestly, that notation is shit...
Are you asking for the impulse function or something (Which is what h(x) is usually denoted by)?
Shining Knights
2004-04-02, 08:40 PM
It matters not whether you win or lose; what matters is whether I win or lose.
Titusfied
2004-04-02, 09:23 PM
So, do you want us to solve for x, x1, and x2 given those equations?
Heh, its just weird because you are giving random equations with a few variables. BTW, why didn't you just name x2 = y, and x3 = z so you don't have to have all the subscript text...?
Shining Knights
2004-04-03, 04:36 AM
It matters not whether you win or lose; what matters is whether I win or lose.
Tyrannicide
2004-04-07, 07:01 PM
wow, i am glad im not taking calculus. Sciences all the way!
Titusfied
2004-04-08, 09:20 AM
Up above, thats not calculus, thats dumb. It doesn't make logical sense...
Medieval Bob
2004-04-08, 10:16 AM
Ya...
You really didn't specify what you wanted solved...
You didn't specify what you intended by Xsub2 and Xsub3. If they are different positions of X, you could have stated as much. If they are different variables, I would have used A, B, and C.
Besides, that's not even particularly calculus from what I can tell... What portion of that categorizes it as a calculus problem?
Here is an example of a calculus problem.
Solve the following:
Double Integral of (e^((2y-x)/(y+2x))dydx) over the region bounded by the points (1,0) (4,0) (0,2) and (0,8) [which is a trapezoid].
Titusfied
2004-04-08, 11:04 AM
Ugh, that exponential is a major pain in the ass to integrate... I started doing this problem, then just said fuck it after integrating it with respect to y. Firstly, that first integral sucks, and secondly, the resulting integral with repsect to x, is an even bigger pain in my integration by parts ass.
I had these types of problems like 4 or 5 terms ago, so I'm not exactly sure if I set it up properly. After plotting the trapezoid, I set up the limits of integration as 0 to 4 with dx, and (-2x+2) to (-2x+8) with dy. I think thats correct, but the actual integration, as stated above, is a little more intensive than I wish to do on my free time, hah!
Maybe later I'll finish the second integral...
MightyJoe
2004-04-08, 01:48 PM
Man i am hoping that i dont have to take anymore cal in school already in Cal 1 and just starting integration and that suxs so good luck with the problem Titusfied
I'm still in General Math :(.
Medieval Bob
2004-04-08, 06:54 PM
It's actually pretty simple if you change the coordinates and can figure out the Jacobian to put in. Don't bother working it without changing coordinates... I was just throwing it out as an example of calculus.
Are you still taking math classes, Titus? I think after Cal 3, I just have to take DiffEQ, Linear Algebra, and any 4000 level math I want (which will net me a minor in Math).
Titusfied
2004-04-08, 09:46 PM
Yeah. I've already taken Calc 1 through 3, Linear Algebra, Systems 1 and 2, Complex Vector Analysis, Transform Methods, Errors Uncertainty and Probability, and Stochastic Systems 1 through 3.
There is really only so much math you can actually do without getting into other aspects. Like, the Errors and Stoch classes all deal with probabilities, decision theory, and detection theory. I've also taken DSP classes which basically deal with graph theory, Fourier Transforms, Z-Transforms, and LaPlace Transforms. For EE's, the math never really stops, just starts getting convolved into other subjects.
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