Just a late night rant...
 02112006, 04:32 AM
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Just a late night rant...
Is anybody else up at 1:30am doing homework? God, it sucks, doesn't it?
I'm not doing 'hard' work, but, graphing logarithmic functions by hand, and finding 'assymtotes, inflection points, extremums, etc' can get very drawn out, tedious, and boring. Right around now, its taking me 3x longer to do this work than it should be b/c I keep making stupid mistakes with eyes halfopen. So yeah....goin' to bed now. I've got to be up in a few hours to take a CPR certification... *sigh*
K, bed time. C ya.
< eat first  02112006, 08:28 AM
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Originally Posted by kwyckemynd00  02112006, 08:42 AM
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And who said Marines weren't smart.

 02112006, 08:43 AM
Originally Posted by kwyckemynd00  02112006, 09:51 AM
Originally Posted by jarhead  02112006, 11:34 AM
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Originally Posted by natedogg  02112006, 11:57 AM
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Originally Posted by Beelzebub  02112006, 12:00 PM
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fair enough.
i'll make it up tonight  02112006, 12:02 PM
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Originally Posted by Beelzebub
Besides, Kwycke is too much of a wuss to withstand the Corps.  02112006, 12:56 PM
Originally Posted by Beelzebub
im sorry you had a bad night hun  02112006, 01:04 PM
Originally Posted by Mrs. Gimpy!
New one...  02112006, 01:10 PM
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Originally Posted by houseman  02112006, 01:18 PM
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Originally Posted by houseman
BTW nice avatar nate. Who gets to ride up front?  02112006, 01:26 PM
Are you taking College Algebra?
 02112006, 07:20 PM
Originally Posted by houseman  02112006, 07:53 PM
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Originally Posted by meowmeow  02112006, 07:56 PM
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Originally Posted by PVSkyHigh  02112006, 07:58 PM
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Originally Posted by natedogg  02122006, 06:01 AM
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Check out Mathematica. It's a little expensive, but it's worth it if you have much more math to take. I'm working on my MS in Math and it has been worth every penny.
 02122006, 07:43 AM
Originally Posted by kwyckemynd00
And Mathmatica is some good software  02122006, 03:50 PM
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hmm...I'll take a look at that....thx for the info!
Hasn't been too bad so far, but, its just all the trig that sucks. when you've not really used it in over a year, it creates problems  02122006, 04:08 PM
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Getting my hands on a 'trial version' as we speak
 02122006, 08:02 PM
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Here's a good link to help with basic plotting:
http://documents.wolfram.com/mathema.../section1.9.1
Let me know if I can be of any help.  02122006, 08:18 PM
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Thx bro, i appreciate it.
i didin't know they actually offered a 'trial version' on their website, but i just saw that in the link you gave me...i guess, it would be more correct to say i've got a 'backup copy' on the way, b/c its not actually a 'trial version'  02122006, 08:38 PM
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Mathematica is some freakin' awesome software. I've got a notebook I can shoot you where I was working on Cubic Roots. Some ideas on finding the extrema and inflection points along with some good visuals when plotting. Here is a pic of one of the graphs.
 02122006, 10:36 PM
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Nice, bro...My download just finished...is it easy enough to learn to be useful for helping me in my test in a couple days? I don't have a calc book, and the xerox @ the library broke, so I got put behind 5 sections! haha.
I really know 'nothing' about mathematica right now, other than you guys recommended I look into it...so, anything and everything you've got for me is much appreciated
thx again!  02122006, 11:23 PM
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Hey, how did you tell the program to define those points? I'm playing around with it, and haven't quite figured that out yet Thx!
 02132006, 06:45 AM
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Shoot me a problem and what solutions you need. I can work an example and send you the notebook.
 02132006, 10:31 PM
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Oh, no need to go out of your way bud. I did a little bit of research, and, its not 'that' necessary for me at the moment to have those cool little extra features, ya know? It seemed like it would be convenient, but after reviewing how much code goes into it, its not worth it right now since it was 'just for fun' so to speak.
I do have one question though...when I solve for x in an equation (looking for critical points) I often get multiple points, of course. Now, how do I assign those pionts to different variables so I can later plug them in to solve for their corresponding y value?
thx!  02142006, 06:46 AM
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I've attached a zipped notebook. All you have to do is plug in the original equation and then evaluate the rest of the cells. plot1 has a range of 5,5 so you may have to change that depending on what you are working with. Hope this helps.
 02142006, 04:23 PM
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Thx bro, I appreciate it....I'll keep foolin' with it, this thing is pretty cool
 02172006, 09:46 PM
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Oh, so lame. I didn't sleep well the night before my first test (got to bed around 5:00am) and I totally 'blanked' out.
I got stuck, twice, on simple substitutions during integration by parts questions, e.g.
I=Integral[ x / Sqrt[1x^2]]dx
Let U=1x^2, dU=2xdx
I=1/2[2Sqrt[1x^2]dx
= Sqrt[1x^2]
Yeah, simple substitution right? Yeah, I know...lol. I also decided I need to invest in a graphing calculator. I see all of these kids who have all of the formulas either programed into or saved into their graphing calcs, and they can check their derivatives, integrals, graphs, etc while I have to guess. Best case 'possible' I'd get a 90%, but I think that'd be pushing it. I'm probably on B/C range on this test, all because I got caught up with a simple substitution problemsomething I could easily answer / should have easily answered. The bummer is, the partial credit will be next to nothing because it was in an integration by parts question. So, I was basically on step 2/5 or so. lol.
Then, I went to a public speaking class afterward, and I couldn't even speak. I'm not shy either, and I've got experience in public speaking (small groups). Its amazing what a lack of sleep will do to you. wow...  02182006, 09:11 AM
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I know what you mean about the lack of sleep. I'm the type that I'd rather get in bed around 9:00pm and get up super early to study rather than stay up late. I don't function well at all when I stay up late (no pun intended).
Check out the TI89. I love it.  02182006, 10:26 AM
Let me know if you need any help with Calculus 2.
I will tell you though that Calculus 2 gets easier as the time goes by.
The TI89 Titanium is a must own if you ask me.  02202006, 01:07 AM
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Yeah, so far, I don't think there is much I couldn't answer with the material we've covered, but the lack of sleep made things pretty horrendous for me. I didn't even feel like me...
TI89, eh? I've heard its a good one. I may have to buy it some time here.
Thx for the help/input guys.
I've actually been using mathematica to do homework in My hand writing is very sloppy, and therefore I sometimes lose my place (maybe sometimes is an understatement), so using it makes things very nice! Only, I've found myself using Log[x] in place of Ln[x] outside of mathematica...that wouldnt' go over well on a test  02212006, 05:54 AM
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Okay, I've got one...I keep getting the wrong answer on this.
Note: Log[A] = ln(a); I wrote it inside mathematica and it reads Log[A] as ln[a].
The correct answer should be
Log[e^x + Sqrt(4+e^2x)]+C, so I'm either adding a factor of 1/2 or missing a factor of 2 before I get it into log form (or maybe in the back substitution)...
any help is appreciated.thx, km00Last edited by kwyckemynd00; 06032006 at 09:02 PM.
 02212006, 09:20 PM
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I'll have to print this out and have a closer look.
 02212006, 10:15 PM
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Thx bud...I'm just STUCK.
O/T: I've taken time off from my math courses prior to this class, and previously never paid much attention to trigonometry during my classes, and I cannot believe how much trig there is and how many identities i need to recognize so far in calc ii. So, I've had to spend a lot of time familiarizing myself with them....*snore*  02212006, 10:44 PM
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I "think" I figured it out. I"ll try it later and check myself. But, I 'believe' I messed up when i substitued x/a = tan[v], if I substitute x=a tan[v] (yes, I know its the same) I shouldn't mess up my backsubstitution. i can't figure out where i messed up, so I figure I'll go around
I'll try it after i eat.  02222006, 12:20 AM
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Okay! That didn't do it for me iether! same exact result! GRRRRR!
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