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C2 May 2012 Edexcel - Post Exam Thread - Paper and Solutions in the FIRST POST

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  1. Offline

    (Original post by bong)
    Boundaries must be high for this one
    according to me it was a good paper , but still don't want boundaries to be high
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    I got 2.12
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    Yess i got all correct!!!!!!!!
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    hated the proof bit ¬¬ i think i only scored one mark for that part. other than that question, it was a really goooooooooooooooooooooooood paper (Y)
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    Hoping for 77 UMS so I don't have to retake any other units. No horrible questions from my end. Looking at around 85%+ but God knows what % that will end up as because to be honest I figured that the grade boundaries would be insanely high as soon as I saw the last question...
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    (Original post by Phoebe307)
    what did people get for the area under the curve or whatever it was?
    57 1/6 or something like that
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    I also got 85mm, 364/6 and 15 for the geometric.

    I got 1.2 or something for trapezium maybe it was 1.8)
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    (Original post by MathMad)
    did anyone get the first term on the geometric series equalling to 15, the common ratio being 0.6, and the sum to infinity being 37.5? i got something like that.
    yaay i got that =)
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    Hadn't learnt the proof.

    Rest was easy.

    Checked the paper, everything but the proof. So at least 71, I hope.
  10. Offline

    Looking at the unofficial mark scheme, I got every answer right, so will be 100ums, unless I drop stupid marks in the working out.
  11. Offline

    for the trig question say you got the values 39.2,90,140.8 and missed 0 and 180 how many marks would you get?
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    100% woooooo :d
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  14. Offline

    Just looked through the paper. Full marks!!!!
  15. Offline

    Grade boundries are going to be so HIGH. Just hope ive not made any stupid mistakes -_-
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    (Original post by Arsey)
    thanks for putting up the answers. For the trig question, I made a silly mistake and got cos2x=-1/5 rather than +1/5. I continued to work out the values using the -1/5 though, at an estimation how many marks do you think i'd lose?
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    (Original post by 0range)
    looooool omg i did that @ the start!!!!
    Somehow got 120 / 4(pi) = 30(pi)
    kajenkjnaekfjkaenf thats what i got
  18. Offline

    (Original post by Arsey)
    C2 May 2012

    Overall I think this was a very easy paper.

    Q1 Binomial Expansion

    Standard and no tricky b)

    Q2 Logs

    Standard, very easy

    Q3 Circles

    I expected a rearranging into circle form, the rest of the question was very easy, part d) was a joke

    Q4 Factor Theorem

    Very easy

    Q5 Area under a graph by integration

    Slightly harder than normal as trapeZia often cause problems

    Q6 Trig

    I thought this was pretty easy but I understand it has caused quite a few problems

    Q7 Trapezium rule


    Q8 Trig

    Pretty standard, lots of frameworking.

    Q9 Geometric series

    I hope you learnt the proof.... rest of the question was straight forward.

    I think the boundaries will be really high

    Last few June boundaries were 62, 62, 53, 63, 59, 67 for 80ums

    I will guess at

    100ums - 75
    90ums - 70
    80ums - 65
    70ums - 57
    60ums - 50
    50ums - 43
    40ums - 36

    This thread will be locked at somepoint and then unlocked at midnight following the Core 2 examination. I will upload the paper and my solutions to this post.

    I will do my best to answer questions about the paper but please try to read the thread first so that I am not answering the same questions lots of times.Here are some links to previous D1 threads, they are worth a read and you will see what the common errors were...

    C2 Jan 2012 - http://www.thestudentroom.co.uk/show....php?t=1892666

    C2 June 2011 - http://www.thestudentroom.co.uk/show....php?t=1619114

    The second link has loads of past papers, mark schemes, model solutions etc

    Good luck.
    Hi Arsey, cheers for posting a solution.

    For 8)c) would it be alright leaving x as the exact answer (ie the cube root of 30 over pi)?
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    For question 9, I forgot the ar^n at the end for the first step, but did everything else correct so how many marks would I lose?
  20. Offline

    I calculated the perimeter of triangle instead of the sector! Haven't read the question properly... How many marks would I lost?
Updated: January 12, 2013
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