Bishup Posted October 3, 2010 Report Share Posted October 3, 2010 dude what thesis? Everybody answers the same question or statement. You investigate a statement concerning an area of maths. The titles are prescribed. The IB prescribes 4 titles for each IA type. Reply Link to post Share on other sites More sharing options...
lmnop Posted October 3, 2010 Report Share Posted October 3, 2010 dude what thesis? Everybody answers the same question or statement. You investigate a statement concerning an area of maths. The titles are prescribed. The IB prescribes 4 titles for each IA type.I'm working on the Infinite Summation SL Type 1 task. Would you not call this an IA? If not, then sorry I misnamed it. But I DO need a thesis/problem/question, whatever it is that you wish to call it. Reply Link to post Share on other sites More sharing options...
maumauman Posted October 5, 2010 Report Share Posted October 5, 2010 hi, i got the general statement as ax not a^x?? cos if i change the value of a to 2 n x to -5, my answer is -10. when i change the value of a to 2 and x to 3, my answer is 6 and not 8? can someone teach me? Reply Link to post Share on other sites More sharing options...
Cynthia Posted October 5, 2010 Report Share Posted October 5, 2010 Lilie; No, it is completely different.maumauman; Are you using Excel or something similar for the calculations? If so, check that there are no errors in your function Reply Link to post Share on other sites More sharing options...
uken Posted October 6, 2010 Report Share Posted October 6, 2010 Lilie; No, it is completely different.maumauman; Are you using Excel or something similar for the calculations? If so, check that there are no errors in your function I got ax as well? I tried with different a and x but they all seem to prove that t9(a,x)=ax. I used Exel to calculate. So for instance, when a=2 and x=10, I typed:"=((10)*LN(2)^A4)/FACT(A4)". A4 being the n term. I don't know what I typed wrong though 'cause it seem to work....? Reply Link to post Share on other sites More sharing options...
helenpark Posted October 6, 2010 Report Share Posted October 6, 2010 I just got my IA today.. and i still have app. 2 weeks to do it.. my teacher in school told me to do it in excel.. but i dont understand anything. can anyone help me? please? 1 Reply Link to post Share on other sites More sharing options...
uken Posted October 6, 2010 Report Share Posted October 6, 2010 (edited) I just got my IA today.. and i still have app. 2 weeks to do it.. my teacher in school told me to do it in excel.. but i dont understand anything. can anyone help me? please?Hey art HL buddy! It's nice to see a visual arts student here. Anyway, what you can start off in excel is make a chart, with one column being the n terms, one column to input the terms (tn), and the third column being Sn, then sum. (And a bit off topic here but I'm also doing a similar question for EE ^^) Edited October 6, 2010 by uken Reply Link to post Share on other sites More sharing options...
onejpu2 Posted October 7, 2010 Report Share Posted October 7, 2010 I just got my IA today.. and i still have app. 2 weeks to do it.. my teacher in school told me to do it in excel.. but i dont understand anything. can anyone help me? please?Hey art HL buddy! It's nice to see a visual arts student here. Anyway, what you can start off in excel is make a chart, with one column being the n terms, one column to input the terms (tn), and the third column being Sn, then sum. (And a bit off topic here but I'm also doing a similar question for EE ^^)I just got this IA yesterday and I have no clue where to begin. What does it mean when it says " Calculate the sum S (subscript)n of the first n terms of the above sequence for n is between 0 and 10" ? The above sequence is t(subscript)n = (xlna)^n / n! Any help is very much appreciated!! Reply Link to post Share on other sites More sharing options...
helenpark Posted October 9, 2010 Report Share Posted October 9, 2010 Hey, I have the same assignment as you.The general formula is a^x. Your value for a should be the point on the y axis at which the asymptote approaches. Good luck hello, well.. im not asking for the answer.. but can you just tell me roughly or method how to find the general formula? a^x? Reply Link to post Share on other sites More sharing options...
helenpark Posted October 9, 2010 Report Share Posted October 9, 2010 (edited) Hi everyone,We just got our Maths IA and it's about Infinite SummationsDid anyone else get that same IA?I'm having trouble finding a general formulaEven though I'm getting an arithmetic series for this problem, the formula that I come up with doesn't work properly.The only thing I know so far is that n = Sn, so every time n changes its value, Sn becomes that same value.The problem is:(x ln a) 1Where x = 1 and a = any number between 0 and 10 (includes 0 and 10)And the first term for a = 2If anyone could help me, thanks in advance.what i got so far is that *****whenever you change the value of a and as long as you keep x as 1, ************* Edited October 9, 2010 by Mahuta ♥ Do not give out an equation you concluded in your math IA- Maha :) Reply Link to post Share on other sites More sharing options...
nyqtodqb6z Posted October 9, 2010 Report Share Posted October 9, 2010 (edited) hey guys those who have gotten ax is obviously wrong. The conjecture is the latter one. The reason for getting ax is because you did not bracket it properly!!!((10)*LN(2)^A4)/FACT(A4) ... this is wrong, as you can see you are powering the LN(2) to A4. However the question asked you to power the whole thing!! so if you just add ONE MORE bracket behind the 2 you will get it right!!!. ((10*LN(2))^A4)/FACT(A4). this changes the whole meaning. now both LN2 and 10 are being powered! so be careful, handle your brackets properly! Edited October 9, 2010 by Daedalus Very important point, I made it bold.- Maha :) Reply Link to post Share on other sites More sharing options...
helenpark Posted October 10, 2010 Report Share Posted October 10, 2010 I just got my IA today.. and i still have app. 2 weeks to do it.. my teacher in school told me to do it in excel.. but i dont understand anything. can anyone help me? please?Hey art HL buddy! It's nice to see a visual arts student here. Anyway, what you can start off in excel is make a chart, with one column being the n terms, one column to input the terms (tn), and the third column being Sn, then sum. (And a bit off topic here but I'm also doing a similar question for EE ^^)(Hi art buddy! really? im doing something on roy lichtenstein.. most of his works are derived from comic books.. )thanks for the advice.. i have done that.. but I'm finding problem with the plotting relations of Sn and n. any help? Reply Link to post Share on other sites More sharing options...
jilking Posted October 10, 2010 Report Share Posted October 10, 2010 (edited) Hi guys i just got this assignment 2 days ago and im very confused.for the question where it says "Now consider a general sequence where x=1. Calculate the sum Sn of the first n terms of this gernal sequence for between 0 and 10 fir diferent values of a" Do i use the formula that looks like this : Sn =a - ar^n ---------- 1 - rIf so, how do i find r? Edited October 10, 2010 by jilking Reply Link to post Share on other sites More sharing options...
CMRO Posted October 10, 2010 Report Share Posted October 10, 2010 i got the general formula as a^x but this is valid only till x=3 for my investigation, for different values of a.so did anyone else too got the same limitation??Am also doing this coursework.I've done the two specific ones where x=1, a=2 and where x=1, a=3 but am now trying to do the general sequence for a where x=1 and am not sure how to go about this. I've written this out in full 10∑r=0(ln a )^n/n! but have no idea where to go from there. If anyone could give me some indication of how i'm meant to start adding these would be a massive help!Thanks.READ THE QUESTION properly and carefully you will get the answer to the question......use different values of 'a' too..i am getting the same limitation, and dont know what to do about it!!!!!! what is the general formula for x is greater than 3?!?!?! Reply Link to post Share on other sites More sharing options...
ayjaytee Posted October 10, 2010 Report Share Posted October 10, 2010 This is my first IA and what not so I want to make sure I get it right. I did everything with a=1, a=3, and substituting my own numbers to find the limits but I'm not sure how to arrive at a general statement... Some people have suggested a^x but I don't see how that works. Anybody else having more luck? Reply Link to post Share on other sites More sharing options...
CMRO Posted October 11, 2010 Report Share Posted October 11, 2010 This is my first IA and what not so I want to make sure I get it right. I did everything with a=1, a=3, and substituting my own numbers to find the limits but I'm not sure how to arrive at a general statement... Some people have suggested a^x but I don't see how that works. Anybody else having more luck?this is my first IA as well. the problem is that i have found a^x only to work for when a is less than or equal to three. i have NO CLUE what to do when a is some other number. the limitation seems so large that i think there must be a mistake..... i'm also having problems with the summation notation, because we didnt really cover that in class so well....does anybody know how to represent the idea that as n approaches infitiy bla bla bla in mathematical notation?also, some have suggested ax, but that does not work at all for me....my Sn values are much too high for that... any help would be greatly appreciated! Reply Link to post Share on other sites More sharing options...
helenpark Posted October 11, 2010 Report Share Posted October 11, 2010 can anyone tell me what software do you use to plot the relation between Sn and n? Reply Link to post Share on other sites More sharing options...
onejpu2 Posted October 12, 2010 Report Share Posted October 12, 2010 can anyone tell me what software do you use to plot the relation between Sn and n?download geogebra. It's free and easy to use... Reply Link to post Share on other sites More sharing options...
IB Bandit Posted October 16, 2010 Report Share Posted October 16, 2010 getting ax not a^x confused face Reply Link to post Share on other sites More sharing options...
AirenMaxence Posted October 17, 2010 Report Share Posted October 17, 2010 The problem i have is provingt the conjecture other than substituting in values Reply Link to post Share on other sites More sharing options...
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