According to last year's entrants you need 4 'good' answers to get a grade 2.(Original post by DonnaB041986)
Yeah I got the same as what I'd got earlier in the question. I really didn't like the rest of the paper though.
do you have any idea roughly how many questions need to be complete/mostly complete to get a grade 2? im sure someone will have asked about that before.
Donna
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 01072004 17:28

It'sPhil...
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 01072004 18:15
(Original post by meepmeep)
If you took the sum of 1/r2^r to n=3. you get 1/2+1/8+1/24=16/24=2/3
As ln2=SUMr=1 to r=n of 1/r2^r +In+1, then ln2=2/3+I4 (I think). Weird that you got the harder limit and not the easier one though. That was the weirdest exam in my life though. For the first hour and a half, I literally couldn't do anything. I ended up trying to integrate sechx for about 20 minutes then mucked around with 3 to no avail. I was ready to walk out the exam hall really. Then I thought to myself, I'm never going to do this, at least give a good account of yourself. Then I twigged the difference of two squares in 2 and then it went great from there and I got 4 questions completely finished (2, 6, 7 and 13). I'm confident with my solutions to 2, 6 and 7 and am semiconfident about 13. I went from feeling miserable to great in an hour and a half. If only I;d have stopped running about like a headless chicken and panicking for the first hour and a half!
Thinking about it, 8 is really easy although I made an incredibly stupid mistake which meant i only got half (if that) of it. 
Turbonutter
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 01072004 18:39
I still don't know the solution to q1.. I got int(0,a) [sinhx/cosh2x] but I couldn't see where to go from there.
Maybe another approach... difference of two squares?
http://www.sinewave.net/stuff/STEPIII2004q1.jpg 
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 01072004 19:02
(Original post by Turbonutter)
I still don't know the solution to q1.. I got int(0,a) [sinhx/cosh2x] but I couldn't see where to go from there.
Maybe another approach... difference of two squares?
http://www.sinewave.net/stuff/STEPIII2004q1.jpg 
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 01072004 19:05
The very first part can be doing using partial fractions, didn't do the rest though.

Turbonutter
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 01072004 19:19
Aha, u=coshx does indeed work.
As does the difference of two squares.. took me about 10 minutes. Shame I didn't have this insight in the exam.
I swear a cup of tea and Powerslave/Brave New World goes a long way to mathematical enlightenment 
It'sPhil...
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 01072004 19:34
(Original post by Turbonutter)
Aha, u=coshx does indeed work.
As does the difference of two squares.. took me about 10 minutes. Shame I didn't have this insight in the exam.
I swear a cup of tea and Powerslave/Brave New World goes a long way to mathematical enlightenment
u = sinhx in the second
Take them away and let a> infinity
U = e^x gives INT 1/(u^4 + 1) du = 1/2 of displayed answer
Did this question quite easily in the exam. Didnt do any other questions as well as i did this one 
Turbonutter
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 01072004 19:54
Thanks.
Odd that.. I find the mechanics questions easiest of the lot, whereas most people don't like them at all.
The one with the two strings and a mass was just basic SHM. 
Drederick Tatum
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 01072004 22:00
(Original post by yawn1)
According to last year's entrants you need 4 'good' answers to get a grade 2. 
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 01072004 22:06
(Original post by Drederick Tatum)
i thought 4 'good' answers got a grade 1? Also, how much of the question do you have to do/get right for it to be good?
Edit: I missed of a few little things like when cancelling stuff in an inequality in q.4 not saying that i could because they were >0 or in q.3 the graph might not have been very well explained. I'd say my answer is still good but not complete. But i got part (2) and so part(3) of q. 13 wrong because of an arithmetic error, and i'd say it wasn't good, i'd say it was a 'beta', a half complete question... 
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 01072004 22:21
oh dear , i got 3 parabolas in q8, thought it was too good to be true
plus q6 i missed the last part out but my answer to part b was quite good i think (used my formula for 1,2,1,2,1... that came to me in a dream once.... don't ask)
was gona do the SHM one too but thought it might take too long ... do the mechanics ones generally take longer?
didnt even turn the page to the stats q's!!
and in q1 i got the last part to be half of the printed answer too.
did anyone do question 2??? what did you get the left side of the graph to look like???
good luck for tomorrow everyone btw 
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 01072004 22:29
(Original post by stephx)
oh dear , i got 3 parabolas in q8, thought it was too good to be true
plus q6 i missed the last part out but my answer to part b was quite good i think (used my formula for 1,2,1,2,1... that came to me in a dream once.... don't ask)
was gona do the SHM one too but thought it might take too long ... do the mechanics ones generally take longer?
didnt even turn the page to the stats q's!!
and in q1 i got the last part to be half of the printed answer too.
did anyone do question 2??? what did you get the left side of the graph to look like???
good luck for tomorrow everyone btw
if v(n) = 1 for n even and 2 for n odd
then v(n+1)^2 + v(n)^2 = 5 = 4.v(n).v(n+1)  3, since one of v(n) = 2 and the other is 1? 
Drederick Tatum
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 01072004 22:32
(Original post by beauford)
Well if q's are out of 20, you certainly won't need more than 60 for a 1, so 4 good answers should be sufficient. I'd say an answer is good if you do nearly all of it, or do all of it but make a stupid error somewhere, it's the idea that counts
Edit: I missed of a few little things like when cancelling stuff in an inequality in q.4 not saying that i could because they were >0 or in q.3 the graph might not have been very well explained. I'd say my answer is still good but not complete. But i got part (2) and so part(3) of q. 13 wrong because of an arithmetic error, and i'd say it wasn't good, i'd say it was a 'beta', a half complete question... 
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 01072004 22:34
(Original post by Drederick Tatum)
So how many marks out of the 20 do you think you would get for a beta, say your question 13 for example? 
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 01072004 22:38
(Original post by beauford)
Steph, for q.6 part b, surely the answer was obvious.
if v(n) = 1 for n even and 2 for n odd
then v(n+1)^2 + v(n)^2 = 5 = 4.v(n).v(n+1)  3, since one of v(n) = 2 and the other is 1?
has a 5 in there somewhere right!
ran out of time for part c though, should of just stuffed something down even if it was a load of crap. better than leaving it blank, i hate leaving stuff blank what was the answer to part c? 
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 01072004 22:45
(Original post by stephx)
well, i ended up with 2^2 + 1^2 = 5 i think !
has a 5 in there somewhere right!
ran out of time for part c though, should of just stuffed something down even if it was a load of crap. better than leaving it blank, i hate leaving stuff blank what was the answer to part c? 
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 02072004 14:00
(Original post by beauford)
I think the answer to part c was 1,2,7,2,1,2,7,2....
what i did of q6 was basically stuffed into the last 25 mins of the exam so i spose any marks are better than nothing...
was thinking about paper 3 all last night though, got really bad insomnia, didnt get to sleep til about 1 and had to get up at 6:30... needless to say i didnt give my best performance today
cant see either of my papers being higher than a 2 now to be honest .... oh dear *hoping im wrong and that the grade boundaries are low* 
royalchicken
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 05072004 17:39
Can anyone give me an idea of how I did? I'm an American trying to do maths at Robinson College, Cambridge, and my offer is 1, 2 in STEP 2 and 3 respectively. I did 2, 3, 6, 7, 8 on STEP 3 as follows:
2. I did the whole thing, but half of my sketch was upside down due to copying something down from the first part of the question with an extra minus sign. Does that kill my answer or is it no big deal?
3. I got the desired inequality, and I don't think there was any smoke and mirrors in my proof, although the second inequality they ask you to prove I did in a completely different way from the one suggested.
6. I got 1, 2, 7, 2 etc.
7. I got the inequality by using n = 3  does this sound about right?
8. I only did a third of this one (the first half) because I ran out of time. Will I get much credit for it?
Can I get a 2 out of that? Thanks very much. 
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 05072004 18:42
(Original post by royalchicken)
Can anyone give me an idea of how I did? I'm an American trying to do maths at Robinson College, Cambridge, and my offer is 1, 2 in STEP 2 and 3 respectively. I did 2, 3, 6, 7, 8 on STEP 3 as follows:
2. I did the whole thing, but half of my sketch was upside down due to copying something down from the first part of the question with an extra minus sign. Does that kill my answer or is it no big deal?
3. I got the desired inequality, and I don't think there was any smoke and mirrors in my proof, although the second inequality they ask you to prove I did in a completely different way from the one suggested.
6. I got 1, 2, 7, 2 etc.
7. I got the inequality by using n = 3  does this sound about right?
8. I only did a third of this one (the first half) because I ran out of time. Will I get much credit for it?
Can I get a 2 out of that? Thanks very much. 
Drederick Tatum
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 05072004 19:50
beauford, can you analyse my STEP 3 as well please?
1. Pretty sure i got all of this  the last inequality was half the printed result.
3. Not sure whether my sketchproof was great, but question was good from there.
5. Prove the first 2 preliminary results, but didnt do any of the bulk of the question.
7. Did all this reduction formula question except the very last part  proving the inequality.
8. Did all the parts.
14. There were three parts; for the first, i think i did the summation wrong to find the probability, the second was correct but the third part was dependant on the first two, so it was wrong.
Tatum
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