Guest Posted October 30, 2010 Report Share Posted October 30, 2010 Hey you all!I have to do an IA type 2 in about a weeks time. Our teacher said he had two possibilities for tasks, one of which the population growth in china one and the other one was this one. I was hoping someone could maybe send me the tasks of this one, as i already found the china one. It's just that I want to get an impression as to what that's all about, you know? If there's anyone willing to do this, just send me a mail on my account here and ill give you my e-mail address, ok?THANKS A LOT! take care Reply Link to post Share on other sites More sharing options...
JoeG Posted October 30, 2010 Report Share Posted October 30, 2010 Hey you all!I have to do an IA type 2 in about a weeks time. Our teacher said he had two possibilities for tasks, one of which the population growth in china one and the other one was this one. I was hoping someone could maybe send me the tasks of this one, as i already found the china one. It's just that I want to get an impression as to what that's all about, you know? If there's anyone willing to do this, just send me a mail on my account here and ill give you my e-mail address, ok?THANKS A LOT! take careThere's a scan of the assignment sheet on the first page of this thread. Reply Link to post Share on other sites More sharing options...
ibsurvival101 Posted October 31, 2010 Report Share Posted October 31, 2010 Hi! Does anyone know of any website that generates the stellar shapes so I don't have to dram them out myself? ThanksLook about ten centre meters above You can try this website. http://drop.io/luckytoilet/asset/stellar-jar-2 Then click on download. Reply Link to post Share on other sites More sharing options...
a.ryo Posted November 2, 2010 Report Share Posted November 2, 2010 could someone please help me find a diagram of a 5 vertices and 8 vertices stellar number please. WIth dots please its for coursework Reply Link to post Share on other sites More sharing options...
Gretej Posted November 2, 2010 Report Share Posted November 2, 2010 I would recommend everyone who are struggling with stellar numbers to see the difference between for example S4 and S5. How many dots are added in the new "shell"? E.g. there's 13 dots in S2. In S3 there's 37, which makes the difference 24. The difference between S2 and S1 is 12. Just check this out, because I figured it out immediately.I just had one paragraph where I wrote number of dots in the whole star, and then another paragraph where I wrote how many dots that were added for every "shell/star" (from e.g. S6 to S7).I did it by coincidence, but I got it at once, and the general term(s) were really easy to solve after I saw the pattern(s). I hope I could help any one who's writing the Stellar Numbers-report now! Reply Link to post Share on other sites More sharing options...
iloveushrek13 Posted November 3, 2010 Report Share Posted November 3, 2010 Hey, i just got the stellar number portfolio and sheet and i am really lost on how to do it, infact, even how to start it. Any suggestions and tips would be helpful. If any of you could upload or email me yours that would be greatly appreciated. Don't worry i won't plagiarize or copy any. Thank you:)We're not here to swap IAs. What exactly are you confused about? You said you don't know how to start it. What do you think the instructions want you to do?Hey, its not dat difficult...for da second part, as its a quadratic, u have 2 do it like this: - 1) 1st term=a(x^2) + b(x) + cas 1st term = 1... 1=a(1^2) + b(1) + c => a+b+c=1.thus the same way u continue for the next three terms and u'll get 3 simultaneous equations. solve them and u'll get values for a,b,c...now dat u have these values u get da general statement as a quadratic...u can validate and see dat it works...hi....i dont understand why it is a quadratic?how to find it is a(x^2) + b(x) + c?thanks Reply Link to post Share on other sites More sharing options...
zeuble Posted November 4, 2010 Report Share Posted November 4, 2010 (edited) I used calculus.Derivatives and then integration to find the general statement. It lays out so nicely. The only problem comes when I try to prove the general statement in terms of p and n. I feel that it is too shaky. But that is what I did.Hey! How did you use calculus?? Could you give me a unrelated example?Like only the method? I'm curious..Thanks in advance Edited November 6, 2010 by zeuble Type 'u' fully please (you), thanks- Maha :) Reply Link to post Share on other sites More sharing options...
deissi Posted November 4, 2010 Report Share Posted November 4, 2010 (edited) Hi, I'm new on this forum so please don't bite but...I have a GDC and my teacher said that we must use this if we want to get good marks. But how do I use for sequences? I've almost finished but I haven't used a GDC throughout so I haven't a clue what I can do.HELP! There's a command called seq on TI GDCs. I vaguely remember being able to use it together with the sum command, something like this: sum(seq(formula, variable, start, stop, step))If you have catalog help it will tell you what you need to put in to get a value. You can then say what you did with your calculator, or even type what you typed in your calculator. Just indent it like I did above.Quick Google for "TI seq" gave me this: http://tibasicdev.wikidot.com/seq-list Edited November 4, 2010 by deissi Reply Link to post Share on other sites More sharing options...
theycallmebrookie Posted November 4, 2010 Report Share Posted November 4, 2010 I found that the computer program paint was fairly easy to use to draw my own diagrams when I was working on this. Good luck!!! Reply Link to post Share on other sites More sharing options...
The Mad Hatter Posted November 5, 2010 Report Share Posted November 5, 2010 Hi! I just wan to say thank you all for very useful posts!! And I also have a question about how many words each type should be?! I heard something about 1500 words max, but I don't know if that's for both or for one of them! Reply Link to post Share on other sites More sharing options...
Mahuta ♥ Posted November 5, 2010 Report Share Posted November 5, 2010 I have never heard a word count limit for math IA actually. Apparently it doesn't matter how long it is as long as it fulfills the criteria.Mine was between 39-44 pages. Reply Link to post Share on other sites More sharing options...
zeuble Posted November 5, 2010 Report Share Posted November 5, 2010 This might not be the best way to explain it, but in my mind, I think of the sequences I'm familiar with. I know it's not geometric or arithemetic because there's not a common ratio or difference. It's not one of those weird arithmetic on top, geometric on bottom fraction sequences either. This is why I try to figure out if it's quadratic. I can't explain what it means for a sequence to be quadratic except for the fact that the next term is determined by a second degree polynomial, a quadratic. And you know this by using the finite differences method, although I'm not sure why that works. You could Google it. And then for how you get the coefficients of the quadratic, explain the concept of a system of equations and how you set it up.Hey!I too found the Formula for Tn by graphing saying it's a polynomial and testing and proving that it is quadratic. But I want use mathematically induction to prove it, firstly do you think the IBO will think that i have cheated using a HL method. But I found Sn by using a cubic formula, why do u suggest it's cubic instead or quadratic?And also, when I mathematically induct it, it turns out to be false! Should I put this in and say it doesn't work for all terms??I forgot to mention, I am using induction to try and get 2/2 in quality of work. Thank you in advance! Reply Link to post Share on other sites More sharing options...
iliketoread Posted November 6, 2010 Report Share Posted November 6, 2010 What does the part "Hence, produce a general statement, in terms of p and n, that generates the sequence of p-stellar numbers for any value of p at Sn" mean Reply Link to post Share on other sites More sharing options...
theycallmebrookie Posted November 7, 2010 Report Share Posted November 7, 2010 What does the part "Hence, produce a general statement, in terms of p and n, that generates the sequence of p-stellar numbers for any value of p at Sn" meanIn my understanding, it means find a formula that you can use no matter how many vertices the star has or which stage. Don't forget that p is just representing the number of vertices that the star has and that n is the subscript of the stage number.I hope that helps! 1 Reply Link to post Share on other sites More sharing options...
JoeG Posted November 7, 2010 Report Share Posted November 7, 2010 (edited) This might not be the best way to explain it, but in my mind, I think of the sequences I'm familiar with. I know it's not geometric or arithemetic because there's not a common ratio or difference. It's not one of those weird arithmetic on top, geometric on bottom fraction sequences either. This is why I try to figure out if it's quadratic. I can't explain what it means for a sequence to be quadratic except for the fact that the next term is determined by a second degree polynomial, a quadratic. And you know this by using the finite differences method, although I'm not sure why that works. You could Google it. And then for how you get the coefficients of the quadratic, explain the concept of a system of equations and how you set it up.Hey!I too found the Formula for Tn by graphing saying it's a polynomial and testing and proving that it is quadratic. But I want use mathematically induction to prove it, firstly do you think the IBO will think that i have cheated using a HL method. But I found Sn by using a cubic formula, why do u suggest it's cubic instead or quadratic?And also, when I mathematically induct it, it turns out to be false! Should I put this in and say it doesn't work for all terms??I forgot to mention, I am using induction to try and get 2/2 in quality of work. Thank you in advance!I'm not going to say whether it's quadratic or not (that's for you to find out ), but I will say that it's not cubic.Also, any formula we get really shouldn't work for all terms, logically at least. Remember were working with geometric figures.By we I mean High School math students lol. Edited November 7, 2010 by JoeGuff Reply Link to post Share on other sites More sharing options...
neeek Posted November 8, 2010 Report Share Posted November 8, 2010 okay so im stumped, whats a general statement for the 6-stellar number at stage Sn in terms of n...anybody? thank youu in advancee Reply Link to post Share on other sites More sharing options...
dead Posted November 10, 2010 Report Share Posted November 10, 2010 guys our teachers also told us to find the best fit curve of the equation since it will give you a better grade so i suggest everyone does the same.Also guys how did you graph the stars? which program did you use? Reply Link to post Share on other sites More sharing options...
booknerd444 Posted November 10, 2010 Report Share Posted November 10, 2010 I got the math portfolio a little while ago, and while, i've gotten all the math stuff, i hav no idea wat to write about for my introduction...any ideas? also, any ideas on how to make the diagrams on the computer/? thank u!! Reply Link to post Share on other sites More sharing options...
JoeG Posted November 10, 2010 Report Share Posted November 10, 2010 The links to the programs/pictures you can use to graph the starts have been mentioned many times in this thread. Unless it's been changed, you really can't miss them. Reply Link to post Share on other sites More sharing options...
dead Posted November 12, 2010 Report Share Posted November 12, 2010 guys how did you get to the general statement in the 1st set of triangles? i dont get it Reply Link to post Share on other sites More sharing options...
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