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Edexcel 2016 Core 4 - Model Solutions (1-6, Will complete after gym) Watch

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    http://www.thestudentroom.co.uk/show...5#post66085535
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  1. File Type: pdf core420161.pdf (172.5 KB, 237 views)
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    Shouldn't t= pie/4 for both X and y? Thanks for the solution btw. Can't wait to see solution for Q7 and 8.
    I think I have made some mistakes in the last 2 questions.
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    (Original post by angela06)
    Shouldn't t= pie/4 for both X and y? Thanks for the solution btw. Can't wait to see solution for Q7 and 8.
    I think I have made some mistakes in the last 2 questions.
    No, The original function was  y=5\sqrt3 \sin 2x
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    (Original post by MathsAndChess)
    I have produced some model solutions for the C4 today.
    If there are typos, let me know, their are always typos.
    I will complete the last two questions at gym, Latexing these solutions took too long, but it was fun.
    Enjoy!
    #

    How many marks was question 5?
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    (Original post by MathsAndChess)
    I have produced some model solutions for the C4 today.
    If there are typos, let me know, their are always typos.
    I will complete the last two questions at gym, Latexing these solutions took too long, but it was fun.
    Enjoy!
    can u explain how i got c to be equal to -720
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    (Original post by iBall)
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    How many marks was question 5?
    I left the actual paper in my locker. I think it was 9
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    (Original post by jamessmith15)
    can u explain how i got c to be equal to -720
    Which question?
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    (Original post by MathsAndChess)
    I left the actual paper in my locker. I think it was 9
    for the parametric say I integated tant by accident but continued to wok everythimg throughout how many marks would I have lost>
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    (Original post by iBall)
    for the parametric say I integated tant by accident but continued to wok everythimg throughout how many marks would I have lost>
    I'd say 4, if you used your  \frac{dx}{dt} correctly.
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    (Original post by MathsAndChess)
    I'd say 4, if you used your  \frac{dx}{dt} correctly.
    I hope so man, I got every other mark. Are you familiar with this type of error?

    Also how many marks was each part? My methods were fine it was literally one step
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    (Original post by iBall)
    I hope so man, I got every other mark. Are you familiar with this type of error?

    Also how many marks was each part? My methods were fine it was literally one step
    I think it was 5 and 4.
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    (Original post by jamessmith15)
    can u explain how i got c to be equal to -720
    question 4 mate
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    (Original post by jamessmith15)
    question 4 mate
    There isn't a -720, Do you mean  -\frac25 \ln 60 ??
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    (Original post by MathsAndChess)
    There isn't a -720, Do you mean  -\frac25 \ln 60 ??
    yes I'm asking if you know how i got -720 instead of that
    and how many marks i will have lost
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    (Original post by jamessmith15)
    yes I'm asking if you know how i got -720 instead of that
    and how many marks i will have lost
    i think if i remember correctly i ended up with an equation of
    -1/5x^2=t-720
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    (Original post by jamessmith15)
    i think if i remember correctly i ended up with an equation of
    -1/5x^2=t-720
    Look at my solution.
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    (Original post by MathsAndChess)
    Look at my solution.
    i think its because i had the x ontop of the fraction instead of the bottom.
    How many marks do u think i will loose?
    i ended up with a final answer of:
    x= root (-5t +3600)
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    do you have the answers for 7 and 8 please
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    (Original post by nxp790)
    do you have the answers for 7 and 8 please
    http://www.thestudentroom.co.uk/show....php?t=4185241


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