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OCR MEI- Mathematics C3- 11/1/08 watch

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    So, how did everyone find it?

    I found it quite easy compared to past papers.
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    I thought it was.
    I was finished in 35mins around as planned, the checked it for 30, and by 5 past 10 I was very bored.

    What did u get for question 8, the area, It was 1/4pi - 1/2
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    also, dP/dt was -1.0

    and dP/dV was -500/V squared
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    Heres my answers:

    1 - 4x/(1+6x^2)^2/3

    2
    (i) fg(x) (x-2)^2, gf(x) x^2 - 2

    3
    (i) b = 0.47, A = 6250
    (ii) £75,557,863.73

    4
    (ii) dp/dv = -500/v^2

    6
    (ii) (0.391, -0.346) my x is wrong though
    7
    (i) dy/dx = (2x)/(x+1) + 2ln(x+1)
    (iii) ln2 - 0.5
    (iv) 0.

    8
    (i) strech 1/2 in x-axis
    (ii) pi/2
    (iii) f(x) = 2, f'(x) = 1/2
    (iv) 0 - 2
    (v) arcsin(x-1) / 2

    Mucked up 2 (iii), 5 (i) and 6(ii) only through silly errors.
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    very easy paper to be honest, i expect grade boundaries to be very high
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    8 ii) u got half pi
    But im sure its 1-4pi - 1/2

    y = sin2x + 1
    integrating gives -0.5cos2x + x

    since the boundaries were 1/4pi and 0

    (1/4pi - 0) - (-0.5 x 1)
    = 1/4pi + 0.25
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    wasnt it a 1/4 pi + 0.5 i think you must have just typed it wrong above

    what value for d2y/dx2 did people get in order to confirm that it was a minimum
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    ye ur right lol
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    can any1 remember the integration by parts question?
    I remember subtracting my previous integral
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    I got +4 for the miniumum
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    i do not think i did well im prepared to retake in june
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    sorted i got +4 as well
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    For question
    5 i) the proof question, I got when p = 6, the function works out at 63 and 63 is not a prime number
    ii) I just used logs to the base 2, to work out p
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    It was an okay paper, I think I messed up q8 though
    - somehow I got pi/4 -1/2cos1/2 - 1/2... oh dear..
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    What did any1 get for dP/dt, I think i got -0.1
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    (Original post by andy22may)
    very easy paper to be honest, i expect grade boundaries to be very high
    I hope it wont be high. How high do you expect it to be? The highest I've seen previously is 60/72 for an A. Do you expect it to be as high?
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    Most of the ppl in my exam were working right until the last minute
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    Even if it is that high, u wud have needed 2 drop 12 marks.
    A1, u get 1 mark for a correct answer, so even silly mistakes won't cost u.
    U get more marks M1, B1, E1, for ur theory in a question
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    (Original post by iamsuchatwat)
    For question
    5 i) the proof question, I got when p = 6, the function works out at 63 and 63 is not a prime number
    ii) I just used logs to the base 2, to work out p
    is 6 a prime number then...no one told me..
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    Extremely easy paper, my answers to the integration questions were: ln2-1/2, +-1/2 and pi/2. Dont want to sound arrogant but I checked over everything and couldnt see anything wrong at all, so I'm expecting 100%.
 
 
 
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