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    (Original post by shamika)
    All I was doubting myself because Zacken said I didn't originall estimate 99 / 70 / 60 (I actually said 61 instead but whatever).

    But I still think that is my best guess to date: 99 / 70 / 60. I'm also not sure comparing only to 2010 onwards is right either. Especially if Q1 and Q3 were easy then I think that is a reasonable guess.

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    Does anyone have access to a copy of the paper to see what question 9 wanted b and c in terms of, please?
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    (Original post by ln(sec(x)))
    Does anyone have access to a copy of the paper to see what question 9 wanted b and c in terms of, please?
    In terms of m, M and R.


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    (Original post by Insight314)
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    There's such a thing called print screen...
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    (Original post by Insight314)
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    I thought private messages were meant to be private (but good to know that I wasn't losing my mind. I blame Zacken for the confusion this morning! )
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    (Original post by shamika)
    I thought private messages were meant to be private (but good to know that I wasn't losing my mind. I blame Zacken for the confusion this morning! )
    Do you want me to remove it? Sorry about that, haha. I also forwarded it to Zacken and physicsmaths since they were also curious about the boundaries.


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    (Original post by Insight314)
    Do you want me to remove it? Sorry about that, haha. I also forwarded it to Zacken and physicsmaths since they were also curious about the boundaries.


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    Nope, it's fine, I wish you were around this morning so I could avoid tying myself in knots. (I still stand by my estimates, but the obvious caveats apply. If I get some time I will try a few questions over the weekend to refine my view, but it's unlikely I'll have the time)
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    (Original post by Insight314)
    In terms of m, M and R.
    no, in terms of m, M, and a, where a was the answer to the first part of the question
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    Hi, this is what I got, how many points/what grade should I expect?

    2: complete, except I got a solution x=5 instead of x=4 on part (ii) (apparently i'm not good at adding and substracting one digit ints)
    3: complete, except for checking double roots in the even case in the last part)
    6: did parts (i), (ii), and (iii), not (iv)
    7 (that was the question w/ four parts and integrals right?): only part (i)
    9: complete, but in the last part I calculated the path of the bullet relative to the table (so b+c instead of b), so I got the value of b wrong
    12: complete
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    (Original post by YonRamires)
    no, in terms of m, M, and a, where a was the answer to the first part of the question
    Oh yes sorry. That's what I meant.


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    (Original post by YonRamires)
    no, in terms of m, M, and a, where a was the answer to the first part of the question
    Oh dear. I deserve one sharp whack for being an idiot and running into the question without reading it. I left it in terms of m, M and R. It was just one simple absolutely basic substitution for heaven's sake.

    How much do you think they'll dock for it?
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    Can someone estimate my mark please 😞:

    1: Did the sketch and found both intersections but didn't get very far on the first part, found gradients and equations of tangent (one of which I think was correct)

    2: Not much, showed a+b+c was a factor then found x=1 on the cubic

    3: showed that f'(x) was fn-1 and that a was negative

    Differential eqn: verified both equations and proved the result for z, then differentiated v but didn't get very far

    Integration: did first three parts correctly then next to nothing of the last part

    Other integration: drew a vague sketch with some trapezii, couldn't prove the result. Got the three approximations and showed the error.

    Q13: Proved all three results but only had continuity corrections on the first one

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    (Original post by MathHysteria)
    Seriously, has nobody got a copy of the paper? I want to get my teeth into it over the weekend!
    See the OP.
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    can someone see if I got enough for a 1 😁

    1 - got equation of tangents and found x, didn't get y or show it intersected on the line, but went on to do the sketch of the two curves with the intersection

    3 - did first two parts and showed fn'(a) fn'(b) < 0 but got stuck at the sketches

    6 - got the first two parts
    7 - full, lovely question

    9 - did part i, then got ii in terms of (M m a and u) not just (M m and a)
    11 - full but got the inequality the wrong way round, so kinda fudged it, hopefully in the right place
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    (Original post by liamm691)
    can someone see if I got enough for a 1 😁
    Definitely. I envy you.
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    (Original post by shamika)
    Nope, it's fine, I wish you were around this morning so I could avoid tying myself in knots. (I still stand by my estimates, but the obvious caveats apply. If I get some time I will try a few questions over the weekend to refine my view, but it's unlikely I'll have the time)
    Your S boundary is too high since.
    When in 2014 it was 95/74
    In 2013 it was 100/79


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    Anyone have a solution for 9?
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    Solution to 11
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    (Original post by YonRamires)
    9: complete, but in the last part I calculated the path of the bullet relative to the table (so b+c instead of b), so I got the value of b wrong
    Are you sure that is wrong? That's how I interpreted the question.
    It says "The bullet travels a distance b inside the block before coming to rest relative to the block."
    I took that to mean "In the time from when the bullet enters the block to when it comes to rest relative to the block, it travels an absolute distance of b."
    I did wonder at the time, because I can see both interpretations, but I took that one.
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    Here's Q7
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  1. File Type: pdf New Doc 3.compressed.pdf (648.9 KB, 77 views)
 
 
 
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