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

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    (Original post by rockinhana)
    I've literally done every single C3 and C4 exam questions so hopefully the examiners reuse certain questions to make the exam easier
    Agreed. June 2014 C4 was an example of this to be honest. They had asked similar questions before. Only "new" question was the painting one considering the years involved.


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    Does anyone use the sharp El-9900 calculator? I've got it but want to know what it can do with regards to checking answers in the exam e.g integrals or vectors


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    (Original post by CD223)
    No problem! How was physics?

    What topics do you find hardest on C3/4?


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    not great:-(

    c3 I did last year :-)

    c4 - vectors!

    how about this question 6ii?

    not sure what to do after my last line


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    (Original post by EmilyC96)
    Does anyone use the sharp El-9900 calculator? I've got it but want to know what it can do with regards to checking answers in the exam e.g integrals or vectors


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    http://www.thestudentroom.co.uk/show...5#post55998715


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    (Original post by the_googly)
    not great:-(

    c3 I did last year :-)

    c4 - vectors!

    how about this question 6ii?

    not sure what to do after my last line


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ln(N) = -0.1t + C

    

N = e^{-0.1t + C}

    

N = e^{-0.1t} \times e^{C}

    

Let\ A=e^{C}

    

N=Ae^{-0.1t}
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    (Original post by CD223)
    

ln(N) = -0.1t + C

    

N = e^{-0.1t + C}

    

N = e^{-0.1t} \times e^{C}

    

Let\ A=e^{C}

    

N=Ae^{-0.1t}
    so it doesn't matte which side you put A?

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    Another question (sorry!)

    dont understand how the boom get this answer :-/

    x^3 = t^3 + 3t + 3/t + 1/t^3

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    book*

    question 7ai I should have mentioned!

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    (Original post by the_googly)
    so it doesn't matte which side you put A?

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    Well, I'd put A on the side with t, so you can form an expression with N in it and everything else on the other side.


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    Core 3 and 4 are soo easy, them 2 along with M2 will make my a2 exams and im expecting 100 ums in each.
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    (Original post by the_googly)
    Another question (sorry!)

    dont understand how the boom get this answer :-/

    x^3 = t^3 + 3t + 3/t + 1/t^3

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x= t + \dfrac{1}{t}

    

x^3= \left(t + \frac{1}{t}\right)^3

    

x^3= \left(t + \frac{1}{t}\right)\left(t + \frac{1}{t}\right)\left(t + \frac{1}{t}\right)

    

x^3= \left(t^2 + 2 + \frac{1}{t^2}\right)\left(t + \frac{1}{t}\right)

    

x^3= \left(t^3 + 2t + \frac{1}{t} + t + \frac{2}{t} + \frac{1}{t^3}\right)

    

x^3= \left(t^3 + 3t + \frac{3}{t} + \frac{1}{t^3}\right)


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    (Original post by saeed97)
    Core 3 and 4 are soo easy, them 2 along with M2 will make my a2 exams and im expecting 100 ums in each.
    They're manageable. I wouldn't call them "easy" as many people struggle. I take it you're getting 75s every time then?


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    (Original post by CD223)
    They're manageable. I wouldn't call them "easy" as many people struggle. I take it you're getting 75s every time then?


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    Not 75 all the time but always 70+
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    thanks! you certainly are prepared! i hope the exams go well for you.

    I thought you'd just cube each term so x^3=t^3+1/t^3

    ?

    also which board do you do physics with?

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    (Original post by saeed97)
    Not 75 all the time but always 70+
    That's fair enough. What do you need in M2 for an A* overall?


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    (Original post by the_googly)
    thanks! you certainly are prepared! i hope the exams go well for you.

    I thought you'd just cube each term so x^3=t^3+1/t^3?

    also which board do you do physics with?
    Thank you. That's very kind of you.

    Oh I see. That's a common mistake. If you think of it like three brackets multiplied together it will be clear that more terms are produced.

    For example:

    

\left(3 + 2\left)^{3} \not=\left(3^3 + 2^3\right)

    I do AQA A2 physics. Yourself?
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    (Original post by CD223)
    That's fair enough. What do you need in M2 for an A* overall?


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    Last year wasnt great for me as I didnt show up to lessons and spent most of my time playing football so I ended up with a B overall. I got 78% in core 1 75% in core 2 and 74% in M1. Im resitting core 1 and M1 this year, the core 1 exam went really well, i think i only lost 1 mark and seeing how well im doing with core 3, 4 M1 and M2 im guessing i need to pull off 90% plus in all 5 to compensate for core 2 as i didnt bother resitting it. I regret last year, if i had put my head down there would be no need for resits but i guess one learns from his mistakes.
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    (Original post by CD223)
    Thank you. That's very kind of you.

    Oh I see. That's a common mistake. If you think of it like three brackets multiplied together it will be clear that more terms are produced.

    For example:

    

\left(3 + 2\left)^{3} \not=\left(3^3 + 2^3\right)

    I do AQA A2 physics. Yourself?
    Hows the AQA physics, OCR is ok but damn some of the questions they put in really throws me off, im predicted an A in it though. Whats your predicted?
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    (Original post by saeed97)
    Last year wasnt great for me as I didnt show up to lessons and spent most of my time playing football so I ended up with a B overall. I got 78% in core 1 75% in core 2 and 74% in M1. Im resitting core 1 and M1 this year, the core 1 exam went really well, i think i only lost 1 mark and seeing how well im doing with core 3, 4 M1 and M2 im guessing i need to pull off 90% plus in all 5 to compensate for core 2 as i didnt bother resitting it. I regret last year, if i had put my head down there would be no need for resits but i guess one learns from his mistakes.
    Well it sounds like a big turn around then! Good for you. Good luck with everything and hope it goes well.


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    (Original post by saeed97)
    Hows the AQA physics, OCR is ok but damn some of the questions they put in really throws me off, im predicted an A in it though. Whats your predicted?
    Nice! Yeah I'm predicted A*AAA in Maths, Physics, Computing, History. You?


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