I wasn't asking. I just put the question mark because I wasn't 100% sure it was right(Original post by Whyishow)
p is the translation to the left hence 3 as the asymptote move by 3 to the left. q is the shift up, but as the curve,after taking the modulus, is symmetrical in y it means C and D have the same ycoordinate, therefore, before taking the modulus the y coordinate of C is negative that of D, a value of 6 does that.
For me I thought the paper was hard, and the grade boundaries would probably be around 70 as usualll.. I totally messed up on question 5 on the last bit, cus I thought that freaking thing we had to show was an identity, I feel so stupid nowww for not just subbing an a value innn.. I als messed up my calculations a bit in the vectors question in part d). Otherwise I think i did okay, good thing is i don't need it for an offer or anything haha..
I thought the paper was hard aswell. Completely messed up on 5.c and all of no. 6 and 1. Most of 7 aswell
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AEA June 2011 Watch
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 28062011 23:33

DFranklin
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 28062011 23:39
(Original post by ElMoro)
Hoping for something like that aswell but DFranklin reckons there'll be normal boundaries
Counteracting that, the vector question in particular had a first part that was both tricky and left you in poor shape for the rest of the question if you couldn't get it out. So that may push the marks down a bit.
But if you press me, I'm guessing the distinction mark will be slightly over 70. 
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 28062011 23:55
(Original post by DFranklin)
That's still my gut feeling; I don't honestly think it was more difficult than usual, in fact I'd say it was easier that most years.
Counteracting that, the vector question in particular had a first part that was both tricky and left you in poor shape for the rest of the question if you couldn't get it out. So that may push the marks down a bit.
But if you press me, I'm guessing the distinction mark will be slightly over 70.
I'm not saying there were things that were conceptually hard, but some of the algebra was ugly as ****. I don't know anyone in my college that managed 5 c) i. (Although that's not to say noone in my college did, I haven't spoken to all of them) I go to a very large college and the number of people taking this exam in my college was quite small, and I'd safely say they're the best of the year.Last edited by Webbykun; 28062011 at 23:58. 
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 29062011 00:32
(Original post by DFranklin)
That's still my gut feeling; I don't honestly think it was more difficult than usual, in fact I'd say it was easier that most years.
Counteracting that, the vector question in particular had a first part that was both tricky and left you in poor shape for the rest of the question if you couldn't get it out. So that may push the marks down a bit.
But if you press me, I'm guessing the distinction mark will be slightly over 70. 
superkinetic
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 29062011 04:31
(Original post by DFranklin)
That's still my gut feeling; I don't honestly think it was more difficult than usual, in fact I'd say it was easier that most years.
Counteracting that, the vector question in particular had a first part that was both tricky and left you in poor shape for the rest of the question if you couldn't get it out. So that may push the marks down a bit.
But if you press me, I'm guessing the distinction mark will be slightly over 70.
It's hard to predict the scores; personally I thought 04 is harder than 06 as 04 has the algebraically demanding 'prove that's wrong and write out the correct solution' qn and geometry qn, but 04 boundaries are 2 m higher than 06.
That's my personal take. I've no local friend to talk with for AEA, as all of them took STEP to meet their Imperial offer; I guess there are only 24 from my country taking this AEA. Anyway everything is done so just hope for the best! 
DFranklin
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 29062011 10:22
(Original post by Webbykun)
But you're a much better mathematician than all of us and you could do it not under exam pressure.
You may be comparing the extra difficulty of this than normal to this years extra difficulty of STEP than normal and deducing that it's nothing in comparison.
I think the fact that most people here found it hard is saying something, and a lot of us said that we were easily getting distinctions in past papers.
I do take on board what you say about "easily getting distinctions in past papers", but I have to say that this also seems to be the case yearin and yearout. I'm not really sure why this is the case  I wouldn't have expected exam nerves to be such a big factor, but possibly everyone is less used to "big scary exams" than in my day.
I'm not saying there were things that were conceptually hard, but some of the algebra was ugly as ****. I don't know anyone in my college that managed 5 c) i. (Although that's not to say noone in my college did, I haven't spoken to all of them) I go to a very large college and the number of people taking this exam in my college was quite small, and I'd safely say they're the best of the year.
Once you know that, if we let C be the center of the circle (and we've deduced that the normal goes through C, which is pretty heavily hinted), the the LHS in (i) is the distance CU (edit: squared) (which only requires a tiny bit of algebra to show ). The RHS is the distance CP (edit:squared) (which requires almost no algebra at all).
But yes, this was one of the tougher parts of the paper. Even so, it's only 10 marks, and you should be able to get some of those marks by follow through.
As I said earlier I could see the geometry question pushing marks down a bit  although again, it's not that the question was particularly hard for an AEA question  the issue is that the hard bit was at the start.
There are a lot of complexities in judging the "general difficulty" of the AEA; obviously it's an unusual exam in its own right, but the abilities of the people taking it are even more unusual. You only need C1C4, but many will have covered the FM syllabus as well. Some people will have prepared a lot, some not much at all. A few will have been preparing for STEP II /III as well. Some are expecting to get 90%, and some are hoping to get 50%. And each category will tend to have a different view about whether a paper was hard or not. So, sure, I might be wrong here. It's just a guess, after all.Last edited by DFranklin; 29062011 at 10:35. 
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 29062011 12:16
(Original post by DFranklin)
True. But that's the same scenario every year. So I can be relatively consistent. Unlike you, I'm not comparing the 2011 exam under exam pressure, to every other exam without.
That really doesn't affect my judgement  my memory's not that good.
Every single year, the AEA aftermath is filled with people saying it was the most difficult paper for many years. It even happened last year, which objectively was by some way the easiest AEA paper ever set.
I do take on board what you say about "easily getting distinctions in past papers", but I have to say that this also seems to be the case yearin and yearout. I'm not really sure why this is the case  I wouldn't have expected exam nerves to be such a big factor, but possibly everyone is less used to "big scary exams" than in my day.
I don't think this was algebraically tough  what was mean (and a poor show on the examiner's part IMHO), is that it's not obvious that you're supposed to be switching between "P is an arbitrary point" to "P is the point touching the circle". (Or in other words, it's not obvious (i) isn't supposed to be a simple algebraic identity).
Once you know that, if we let C be the center of the circle (and we've deduced that the normal goes through C, which is pretty heavily hinted), the the LHS in (i) is the distance CU (edit: squared) (which only requires a tiny bit of algebra to show ). The RHS is the distance CP (edit:squared) (which requires almost no algebra at all).
But yes, this was one of the tougher parts of the paper. Even so, it's only 10 marks, and you should be able to get some of those marks by follow through.
As I said earlier I could see the geometry question pushing marks down a bit  although again, it's not that the question was particularly hard for an AEA question  the issue is that the hard bit was at the start.
There are a lot of complexities in judging the "general difficulty" of the AEA; obviously it's an unusual exam in its own right, but the abilities of the people taking it are even more unusual. You only need C1C4, but many will have covered the FM syllabus as well. Some people will have prepared a lot, some not much at all. A few will have been preparing for STEP II /III as well. Some are expecting to get 90%, and some are hoping to get 50%. And each category will tend to have a different view about whether a paper was hard or not. So, sure, I might be wrong here. It's just a guess, after all. 
supergerbil
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 29062011 12:21
I don't want to sound like an ass, but I agree with DFranklin that it wasn't too bad as an AEA paper (it was pretty similar to a lot of past papers I've seen). Granted, I couldn't do the a^2 bit, but besides that, a lot of it seemed quite straight forward (or maybe just compared to step this year which was rather annoying). It seems everybody always says their exam was hardest ever (in most maths things these days) but maybe that's just the exam pressure making it seem harder. I know the other people at college who sat it found some bits hard, but things like the rectangle question were kind of given to you.
Any body remember their answer for the position vector of B? I remember getting something like (17, 7, 1) or something with similar numbers? 
DFranklin
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 29062011 12:26
(Original post by Webbykun)
Hmm to be honest I mostly agree that it wasn't a bad paper, I just made so many slips up that I expect to lose a lot of marks so was hoping to convince myself you were wrong :P. It just sucks knowing you could have done so much better and getting into your firm depended on this exam.
But yes, having everything rest on one exam and not doing as you'd hoped does suck.
How did you prepare for the exam, may I ask? 
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 29062011 12:29
(Original post by DFranklin)
You may be worrying too much about the slips  because there's more work involved in an AEA question than an Alevel one, a few slips aren't such a big deal, I suspect.
But yes, having everything rest on one exam and not doing as you'd hoped does suck.
How did you prepare for the exam, may I ask? 
DFranklin
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 29062011 12:40
(Original post by Webbykun)
I did the 2002  2008 past papers. 
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 29062011 12:59
(Original post by DFranklin)
Did you do any under "exam conditions"? (3 hours, no calculator, no internet etc.) 
DFranklin
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 29062011 13:10
(Original post by Webbykun)
All of them bar two which I did passively. The last one I did was the June 2008 one which I finished in two and a half hours and got over 90% on =/. 
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 29062011 14:02
(Original post by DFranklin)
I can understand you're feeling hard done by then  I can't really suggest anything you could have done differently. 
superkinetic
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 29062011 14:04
(Original post by Webbykun)
Hmm to be honest I mostly agree that it wasn't a bad paper, I just made so many slips up that I expect to lose a lot of marks so was hoping to convince myself you were wrong :P. It just sucks knowing you could have done so much better and getting into your firm depended on this exam.(Original post by DFranklin)
You may be worrying too much about the slips  because there's more work involved in an AEA question than an Alevel one, a few slips aren't such a big deal, I suspect.
Don't worry too much that the examiners don't give credit for yr errors though yr logic is correct. 
Farhan.Hanif93
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 29062011 15:07
I've had a couple of hours free this morning so I decided to come up with some answers. Please note, I haven't painstakingly checked these so one or two may be wrong. I haven't done too much AEA but I didn't think this one was too hard, personally. It had 5c which was a pain to figure out and 6 which took a little work but other than that, the remaining questions fell out relatively straightforwardly. I haven't done Q1 because there are already some good solutions in this thread.
Q3
Q4
(c)Note that
Therefore
Note that .
Therefore or .
Note that over .
Therefore the only solution for over that interval is . The corresponding value of is .
Note that, at and , at both endpoints. This is clearly less than the value of R we found above and since the stationary point is unique, it follows that this area must be a maximum. (Cheers to DFranklin for reminding me of this simple trick from the STEP solutions).
Therefore
Q5
(b)
(ci)
Q6(a)Let the point on L that is exactly halfway between P and P' be given by X where .
Note that the line through P, X and consequently P' has direction:
.
Note that this is perpendicular to the direction of L, therefore:
.
Therefore, the line through P, X and P' is given by:
Also note that . By setting this vector equal to the line through P and X, it follows that the corresponding value of that yields is .
Therefore P' is given by the point on the line with parameter .
It follows that
(b)It's a simple case of plugging the point in the line and showing there's a parameter t that works, so I won't bother typing it out.
(d)Let B have position vector .
Note that
Also, note that .
By the symmetry of the kite in the line L, notice that triangle APB has area .
It follows that we seek t such that
or .
Note that the values of t which produce A and X are 4 and 3.5 respectively. From the diagram, it's clear that t is decreasing as we move in the direction from A to X and thus to B. Therefore and thus .
It follows that .
(f)
Q7(a)
(bi)
Note that
The vertical asymptote at x=0 implies that .
This means that .
Note that there are no real roots for the curve and the symmetry in the yaxis suggests that the function must be even. It follows that works fine for both of these situations. Note also that q represents the translation of the curve given by f(x+3) in the ydirection. In order for the minimums to share the same yvalue once we take the modulus of f(x+3)+q, they must be equidistant from the yaxis to start with. This only occurs when the curve is shifted upwards by 6 units, which proves q's uniqueness.
(ci)
(ciii)
I'll write out the rest of Q6 and Q7 later, if I get time.I've got complete solutions up to all the questions now.
I hope these help ease the nerves a little. Good luck for results day!Last edited by Farhan.Hanif93; 30062011 at 12:05. Reason: Putting up the remaining solutions. 
DFranklin
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 30062011 10:05
(Original post by Farhan.Hanif93)
..
Edit: the implication does work the other way, and that's enough here. On the one hand hoping you can find a m(t) = t solution feels like a bit of a cheat, on the other hand it's obvious you *can* find a solution to m(t) = t here, so once you realise that's enough you can move on.
2nd Edit: for 7(b), the stationary points from (a) must end up as the minimum points in (b). I think this uniquely determines q.Last edited by DFranklin; 30062011 at 10:09. 
Farhan.Hanif93
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 30062011 12:04
(Original post by DFranklin)
If f(t) = t, then f is its own inverse. It which case it is not true to say that .
Edit: the implication does work the other way, and that's enough here. On the one hand hoping you can find a m(t) = t solution feels like a bit of a cheat, on the other hand it's obvious you *can* find a solution to m(t) = t here, so once you realise that's enough you can move on.
2nd Edit: for 7(b), the stationary points from (a) must end up as the minimum points in (b). I think this uniquely determines q. 
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 01072011 00:03
Just quick Q, sorry if its stupid: do the AEA results automatically get forwarded to the unis through UCAS? :P I'm not sure what they class under is all ?

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 12072011 09:56
(Original post by sb2star)
I had no problems with Q2,3,4 and 5... so hopefully I didn't make any mistakes in those...
how did you slove the Q2 ? i counld not sloved it at all
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