Heads22 Posted December 18, 2004 Share Posted December 18, 2004 We just started sigma notation and summations today....I'm hung up on one problem......the only rules we've been introduced to is if k (or i) is taken to the first, second or third power and we need the sumation, or one of a constant. I don't need to know this til Thursday, really, but i'd like to know now......I realize I'm probably missing some stupid ass factor I could take out... Any Calc people? The answer is 158/85......at least, that's what the back of the book says. Is multiplying this out easier? Or is there a shortcut with the four rules we learned? Quote Link to comment Share on other sites More sharing options...
aboz56 Posted December 18, 2004 Share Posted December 18, 2004 Here's my question, why are you in Calculus? I had that my senior year and just about stabbed a pencil up my nose just to get out of a test.... Quote Link to comment Share on other sites More sharing options...
da_bears86 Posted December 18, 2004 Share Posted December 18, 2004 yeah i dont know why im takin it but we're on anti derivatives and integrals so sorry Quote Link to comment Share on other sites More sharing options...
Heads22 Posted December 18, 2004 Author Share Posted December 18, 2004 I dunno. I'm the only one getting an A in the class to the best of my knowledge. I like math, generally. I'm dreading the AP test. It's a good thing two of the other four people in my class are my best friends, or else I'd be bored for the most part. I liked analysis too. It's just interesting..... Quote Link to comment Share on other sites More sharing options...
DBAHO Posted December 18, 2004 Share Posted December 18, 2004 Uhhh.... Talk to Heather. Quote Link to comment Share on other sites More sharing options...
da_bears86 Posted December 18, 2004 Share Posted December 18, 2004 i fall asleep everyday in calculus Quote Link to comment Share on other sites More sharing options...
Heads22 Posted December 18, 2004 Author Share Posted December 18, 2004 yeah i dont know why im takin it but we're on anti derivatives and integrals so sorry That's the section we were on immediately before this. All sorts of crazy symbols... Quote Link to comment Share on other sites More sharing options...
Heads22 Posted December 18, 2004 Author Share Posted December 18, 2004 i fall asleep everyday in calculus Ours is zero hour....worst possible time for focus.... Quote Link to comment Share on other sites More sharing options...
da_bears86 Posted December 18, 2004 Share Posted December 18, 2004 Ours is zero hour....worst possible time for focus.... 3rd hour at 9 in the morning with a monotonic teacher who turns off the lights = im gone Quote Link to comment Share on other sites More sharing options...
Heads22 Posted December 18, 2004 Author Share Posted December 18, 2004 3rd hour at 9 in the morning with a monotonic teacher who turns off the lights = im gone 725 is when we usually begin..... Quote Link to comment Share on other sites More sharing options...
SoxAce Posted December 18, 2004 Share Posted December 18, 2004 Ahhh....ah....AH-Choo!! *sneezed* I'm sorry, I'm allergic to nerds. Quote Link to comment Share on other sites More sharing options...
Goober Posted December 18, 2004 Share Posted December 18, 2004 Ahhh....ah....AH-Choo!! *sneezed* I'm sorry, I'm allergic to nerds. :rolly Quote Link to comment Share on other sites More sharing options...
da_bears86 Posted December 18, 2004 Share Posted December 18, 2004 7:20 here and ace way to steal tha line from i robot Quote Link to comment Share on other sites More sharing options...
Heads22 Posted December 18, 2004 Author Share Posted December 18, 2004 We're athletic nerds in the class, at least. We have starters from football, basketball, volleyball, tennis, golf and baseball. Quote Link to comment Share on other sites More sharing options...
ChiSox_Sonix Posted December 18, 2004 Share Posted December 18, 2004 [1/(0^2 +1)] + [1/(1^2 +1)] + [1/(2^2 +1)] + [1/(3^2 +1)] + [1/(4^2) +1] Answer = (1/1) + (1/2) + (1/5) + (1/10) + (1/17) which is roughly 1.8 I did it quickly, you might wanna double check that Quote Link to comment Share on other sites More sharing options...
Heads22 Posted December 18, 2004 Author Share Posted December 18, 2004 I'm figuring that we have to do it longhand. I have no issue with that, but I just think I'm missing something is all... I got stuck on an acceleration problem earlier and spent 20 minutes on it.....wondering where the hell I messed up....I never changed mph to f/s and I had been doing it right the entire time. [/fun being a nerd] Quote Link to comment Share on other sites More sharing options...
3E8 Posted December 18, 2004 Share Posted December 18, 2004 The easiest way to solve a summation equation with only 5 k values like the one you provided is to simply do by hand or calculator (if it is allowed). I don't know if all the problems are that easy, but ones similar to that will take you one minute with paper and pencil. Solution: [1/(0+1)] + [1/(1+1)] + [1/(4+1)] + [1/(9+1)] + [1/(16+1)] = 158/85 Quote Link to comment Share on other sites More sharing options...
Heads22 Posted December 18, 2004 Author Share Posted December 18, 2004 Yeah, like I said while you were posting, I'd guess...I know how to do it that way....didn't know if there was a rule I was missing.... Thanks guys! Quote Link to comment Share on other sites More sharing options...
ChiSox_Sonix Posted December 18, 2004 Share Posted December 18, 2004 Yeah, like I said while you were posting, I'd guess...I know how to do it that way....didn't know if there was a rule I was missing.... Thanks guys! not many rules when it comes to summation. mostly you're just gonna have to do it like that Quote Link to comment Share on other sites More sharing options...
CrimsonWeltall Posted December 18, 2004 Share Posted December 18, 2004 I'm dreading the AP test. I got low Bs in Calc BC (mainly because I didn't do the homework) and my teacher recommended I not take the AP test because it would just be wasting money. Took it. Got a 5. Quote Link to comment Share on other sites More sharing options...
Gene Honda Civic Posted December 18, 2004 Share Posted December 18, 2004 I got low Bs in Calc BC (mainly because I didn't do the homework) and my teacher recommended I not take the AP test because it would just be wasting money. Took it. Got a 5. Same here Crimson, I always seemed about a week behind in everything -- Mainly because I didn't believe in books at that point. Hard to do homework without a book. I was an ass in HS. The teacher handed out predictions for the test the week before we took it. If you matched his prediction you got out of some long drawn out project over the last month of school... The prediction he handed me? 2 I got a 5. Quote Link to comment Share on other sites More sharing options...
Heads22 Posted December 18, 2004 Author Share Posted December 18, 2004 When did you take your AP test? Aren't they generally in late April or so? When did you get your score back then? Quote Link to comment Share on other sites More sharing options...
greasywheels121 Posted December 18, 2004 Share Posted December 18, 2004 All my AP tests were always first week of May, and I never got my results until June/July. Quote Link to comment Share on other sites More sharing options...
santo=dorf Posted December 18, 2004 Share Posted December 18, 2004 When did you take your AP test? Aren't they generally in late April or so? When did you get your score back then? First week in May, second week in June. Quote Link to comment Share on other sites More sharing options...
CrimsonWeltall Posted December 18, 2004 Share Posted December 18, 2004 I remember the test was only like 4 big questions, and 2 of them were extremely easy. One had a graph with some guy's position over time and the questions were just about his velocity, acceleration, how far he went, etc. Quote Link to comment Share on other sites More sharing options...
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