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

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    What was the x-coordinate for Q (cos2q,sinq) ??
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    Dropped the differential equation as I took out a factor of 1/5 and forgot to sub it back in :'((((
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    (Original post by Ual12)
    What was the x-coordinate for Q (cos2q,sinq) ??
    I got -1/8
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    Did anyone get 11,0,0 as one of their co-ords for E
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    ****ING vectors man!!! FML
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    (Original post by mufcryan)
    I got the same


    Posted from TSR Mobile
    What did you get for coordinates of E, think I screwed up the C one as well :'(
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    (Original post by MoHoosen9167)
    Did anyone get 11,0,0 as one of their co-ords for E
    I got this!
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    For the vectors, I got: OE= 1/2AC + OB, OE= 3/2AC + OB
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    I think I got that one wrong as I ended up with 2 values for x, I got 15 and 12.66 hmmmmm oh dear
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    (Original post by MoHoosen9167)
    For the vectors, I got: OE= 1/2AC + OB, OE= 3/2AC + OB
    Yeah that is what I did, so annoyed about the differential equation!
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    (Original post by MoHoosen9167)
    Did anyone get 11,0,0 as one of their co-ords for E
    Yeah, and 23 something something for the other
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    Did people get 1/3m for the last answer? I set up the equation as 1/k x pi R squared giving you pi R squared over k... pretty sure this is right...can anyone confirm? 1/k as it was inversely proportional to the area btw
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    (Original post by MoHoosen9167)
    I got -1/8

    oh..i got a 1/2
    I found q as pi/6 and just subbed it in cos2q,i'm probably wrong...
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    (Original post by akashpatel)
    Did people get 1/3m for the last answer? I set up the equation as 1/k x pi R squared giving you pi R squared over k... pretty sure this is right...can anyone confirm? 1/k as it was inversely proportional to the area btw
    I just got 3m, not one over
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    (Original post by Ual12)
    oh..i got a 1/2
    I found q as pi/6 and just subbed it in cos2q,i'm probably wrong...
    We already had 1/2 when t=π/6
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    Some values I can remember:
    A=3 B=-1
    (11/3)ln5
    dy/dx = 11/8
    cos2q = -1/8
    r=3
    E(11, 0, 0) and something else
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    I got something like 2ln(2x-1) or something for h'(x)... it said to prove it's decreasing but I swear that would make it increase? What was the right derivative? And would you get marks for saying as x tends to infinity h(x) tends to 0?
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    (Original post by HennersPD)
    Oh ok thanks! For differentiak equatiobs could they ask us to form one which is inversely proportional? :/
    This.
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    (Original post by Nickbonista)
    Yeah, and 23 something something for the other
    Yeah yeah, I did that!
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    (Original post by akashpatel)
    Did people get 1/3m for the last answer? I set up the equation as 1/k x pi R squared giving you pi R squared over k... pretty sure this is right...can anyone confirm? 1/k as it was inversely proportional to the area btw

    I got all the same as you for this 😊
 
 
 
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