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AQA A2 Mathematics MPC4 Core 4 - 9th June 2015 [Discussion & unofficial markscheme] watch

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    Do you think 62-63/75 will be an A?
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    got the inversely proportional bit wrong.... fml i did -k instead of 1/k or whatever so.... method marks possibly?
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    Does anyone know what the vectors question was and how to answer it? Completely messed up the last two parts of it which were 4 marks each
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    What were people's solution for the differential equation
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    (Original post by Eliott2406)
    Do you think 62-63/75 will be an A?
    I think it will be around 62 for an A*
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    Predictions for 80 UMS, 90 UMS and 100UMS???
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    (Original post by CD223)
    I'm gutted. A* gone.


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    Bruh.. Manchester Met here I come
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    (Original post by Emmanuel12344)
    What were people's solution for the differential equation
    What was the differential equation? 😊
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    (Original post by Eliott2406)
    For the differential equation what values did you have to substitute for x and t?
    I did 0 and 0 because it said initially the tank was empty. Could be wrong (probably is)
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    (Original post by SilenceOrNoise)
    Dont worry man you done good in C3 so you still have a clear chance of an A*.

    (Original post by vee_wuvshugs)
    I know how you feel
    Put in so much effort all year and I feel like I've ruined it and let people down. I can't do the mark scheme as I got too many wrong


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    (Original post by Freyk2)
    I did 0 and 0 because it said initially the tank was empty. Could be wrong (probably is)
    I got that - I think it's right!
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    I couldn't do 9c the trig ratio didn't work. Did anyone get it?
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    (Original post by MoHoosen9167)
    For the h(x) one, I did: h(x) = 1/2x-3; h'(x)=-2/(2x-3)^2

    Then some drivel about how x is negative, (2x-3)^2 is positive so -2/(2x-3)^2 is negative
    and the same for positive
    so therefore it's decreasing.
    How many marks do u think that is worth
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    (Original post by jamal_m96)
    I couldn't do 9c the trig ratio didn't work. Did anyone get it?
    What?
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    (Original post by Eliott2406)
    Do you think 62-63/75 will be an A?
    Yes easy. A lot of people in here found it 'easy' but up and down the country it will be a problem from Q6 onwards.
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    If anyone does a mark scheme can someone PM me a link? I'm just so disappointed in myself.


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    (Original post by Freyk2)
    I did 0 and 0 because it said initially the tank was empty. Could be wrong (probably is)
    No, that's correct. You substituted in t = 0 and x = 0 for C =1.
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    (Original post by Ual12)
    For last part of question 3, the decreasing funtion h(x), i differentiated it to 1/(2x-3) , but what did we have to do after that??
    I subbed in 3 and said it was >0 so its decreasing,but it was just a guess
    I differentated it to 1/2*ln(2x-3) which gave it as increasing so i just subbed in 3 and 4 to h(x) and this showed it was decreasing
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    (Original post by Emmanuel12344)
    How many marks do u think that is worth
    4/4 I think.
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    (Original post by jamez870)
    For E I got (11,0,0) and (24,3,0) I think
    Ye that is what I GOT! nice one
 
 
 
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