kkutob Posted September 23, 2008 Report Share Posted September 23, 2008 Facing same problem... questions five and six... deadline after tomorrowPlease help... Reply Link to post Share on other sites More sharing options...
Faze Posted September 24, 2008 Report Share Posted September 24, 2008 I'm not so sure about D=0... Reply Link to post Share on other sites More sharing options...
Alyssa Posted September 26, 2008 Report Share Posted September 26, 2008 my teacher said u dont have to analyse the cubic polynomial as a whole, but also part by part Reply Link to post Share on other sites More sharing options...
Praya92 Posted October 1, 2008 Report Share Posted October 1, 2008 helloI need clarification for Q1. Is the answer for D=1 because D=|-1|. Is that right? I'm not so sure about that.. Reply Link to post Share on other sites More sharing options...
ibcrazy92 Posted October 4, 2008 Report Share Posted October 4, 2008 lol can someone plzzz plzzz give a straight answer or email it to me if u dont feel safe?? I'm stuck on number 5 like everyone.. i dont know how to get D with like 6 intersections..also, wen i do get D, how do i get the conjecture? Reply Link to post Share on other sites More sharing options...
Forester Posted October 5, 2008 Report Share Posted October 5, 2008 If you got D, then what D = would be the conjecture? Wouldn't it? Reply Link to post Share on other sites More sharing options...
boo Posted October 5, 2008 Report Share Posted October 5, 2008 Hey i got stuck in number 3 i was able to make a conjecture about negative values of a but not positive values of a in a quadrant ohter than 1.....HELP Reply Link to post Share on other sites More sharing options...
Praya92 Posted October 10, 2008 Report Share Posted October 10, 2008 Hey guys, how do you know that D must equal to 0? Help me.. i'm desperate on working out no. 5 and no. 6T_T Reply Link to post Share on other sites More sharing options...
Sa7wal Posted October 11, 2008 Report Share Posted October 11, 2008 Well I don't know how you got D=0 for questions 5 and 6, and I hope you could help me. But what I am almost sure of is that it is much more accurate to used radicals rather than decimals in your calculation for SL and SR because you would be using the exact answer and you don't have to round. Reply Link to post Share on other sites More sharing options...
pinkseel Posted October 11, 2008 Report Share Posted October 11, 2008 (edited) Can anyone please explain find D a little for the cubics? It's certainly not as simpl as to subtracting all the S's, because then D=0, which is illogical. It seems one would have to find all the S's, divide the cubic in half (so find D1 and D2). But then what? Add them, subtract them? Modifying previous conjectures does not fit this, unless I'm so wrong about using |-b/a| (sum of roots) for |a|... Or perhaps my idea of D being a simple number is too far-fetched and there is no reason to expect number 5 to be harder than that?I enjoyed the last portfolio, type II, but this with this graphing is being odd to me. Edited October 11, 2008 by pinkseel Reply Link to post Share on other sites More sharing options...
Ejoriah Posted October 12, 2008 Report Share Posted October 12, 2008 Same here I am really stuck on Q5 and 6. I also got to the point where D = 0 BUT it doesn't make sense, and I don't think that's a good conjecture. I think my biggest problem is finding the value of D for cubics. Anyone who knows please tell me here or email me. This is due the 15th we were given just one week to do it.. silly IB deadlines (3 deadlines on one day for me!) Reply Link to post Share on other sites More sharing options...
adityakumar Posted October 19, 2008 Report Share Posted October 19, 2008 helloI need clarification for Q1. Is the answer for D=1 because D=|-1|. Is that right? I'm not so sure about that.. Yes, D for # 1 is 1.Unless you already work to a conjecture before doing #1, your proof for D = 1 is that D= |SL - SR| = (insert math here) = |-1| = 1 Reply Link to post Share on other sites More sharing options...
Praya92 Posted October 27, 2008 Report Share Posted October 27, 2008 Hey thanks man..anyways.. i've finished that part anyways.. thanks again.. Btw, i'm still a lil bit confused about the value of D in no. 5 & 6, because all the values of D is the same..can anyone explain to me just a lil bit? i'm so confused? Reply Link to post Share on other sites More sharing options...
posse02 Posted November 13, 2008 Report Share Posted November 13, 2008 Can someone please explain a bit about part 5 and 6Especially the cubic and higher functions, how are we suppose to right D = l SL - SR l Reply Link to post Share on other sites More sharing options...
SharkSpider Posted November 14, 2008 Report Share Posted November 14, 2008 If you think of questions 5 and 6 as being constrained by |SL - SR|, then you're going to have serious problems. You should examine graphs and intersections, use a real program to calculate your answers to exact values, then see what works and try to explain it. If you have root 3 in two of your roots, root 5 in two others, and root 2 in the other two, then it might be a capital idea to ensure that you cancel out the roots when you do the subtraction. Your job it to determine whether or not a similar conjecture could be found, so don't constrain yourself to the convention established earlier. Make your own, include quadrant 3, and then go for it. 1 Reply Link to post Share on other sites More sharing options...
posse02 Posted November 14, 2008 Report Share Posted November 14, 2008 Would someone be kind enough to recommend a program for this assessment?Thank You Reply Link to post Share on other sites More sharing options...
SharkSpider Posted November 14, 2008 Report Share Posted November 14, 2008 Maple 12 is the idea program for all math related functions, I really can't think of anything else. A trial version is available that should last long enough to do the portfolio, or... other versions... can be found, but that's up to you to figure out. Reply Link to post Share on other sites More sharing options...
michaellwh Posted November 16, 2008 Report Share Posted November 16, 2008 i am also doing this one Reply Link to post Share on other sites More sharing options...
AffectedWonton Posted November 17, 2008 Report Share Posted November 17, 2008 Okay, like every1 else im stuck on number 5 and 6... i've tried all sorts of different ways to approach it but i havent come to a solid conjecture still.. one i found seemed to be D=0 but some were very different numbersT.T please if someone could help me email to [email protected]its due in two days =O Thanks Reply Link to post Share on other sites More sharing options...
theblackraven Posted November 18, 2008 Report Share Posted November 18, 2008 Eh. How do you even prove the conjecture in #3?Me so confused. Reply Link to post Share on other sites More sharing options...
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