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    (Original post by gGinaa)
    I did that too... 6 mark question, we will probably get 2 marks i think


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    Nah I think maybe 3/4
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    So 3^2 x 3^2 = 9^4? Nice logic bro x
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    Yes :-) my friend got the same but not over 5?
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    Anyone else miss Q9? Can't believe that..
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    (Original post by jacalv)
    Arseys MS is out he says boundaries around 70 for a*, 64 for and 57 for a B. Think i got full marks on such an easy paper!
    Stupid liar...


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    (Original post by DoctorDren)
    Let me just say 3^x squared is 9^2x. 100% that's correct
    (3^x)^2=(3^x)(3^x)

    using indices rules

    =3^2x

    http://www.wolframalpha.com/input/?i=%283%5Ex%29%5E2

    or 9^x
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    (Original post by thatcomputergu)
    Did anyone else (24/5,16/5) for where DY/DX= 0? (Q2)
    yes but also -24/5, -16/5 :-)

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    (Original post by DoctorDren)
    Let me just say 3^x squared is 9^2x. 100% that's correct
    You took maths A level and you think this? I advise you to dig out a KS2 maths book. Your maths fundemantals are very lacking if this is what you think.
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    (Original post by thatcomputergu)
    Did anyone else (24/5,16/5) for where DY/DX= 0? (Q2)
    ye i did that aswell.

    But i fkin forgot about the square root so it is +-
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    Do you guys think i can get an A* if I have 68-C3 67-C4.
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    (Original post by Isaac639)
    So 3^2 x 3^2 = 9^4? Nice logic bro x
    There's no need to be mean about it..
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    is there an unofficial mark scheme floating about anywhere
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    (Original post by DoctorDren)
    Let me just say 3^x squared is 9^2x. 100% that's correct
    Sorry... it's actually not. It's 3^2x. (or 9^x)

    3^x squared = 3^x times 3^x = 3^(x+x) = 3^2x, or 9^x if you like. But not 9^2x, nope.

    This time I'm definitely not talking nonsense.
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    (Original post by Ohwhenwilson)
    Judging reactions i'm guessing
    A* ~ 68
    A ~ 61
    B ~ 53
    C ~ 47
    D ~ 41
    E~ 35
    What does everyone think?
    I found it was slightly harder than last years tbh... maybe it was the wording...
    last years was
    A*66 A 59 B 52 C 46 D 40 E 34
    I reckon the grade boundaries may be a little lower... maybe A* 64 A57, B50 C44 D 36 E32
    that;s my opinion anyway.. what does everyone else think?
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    (Original post by Gome44)
    I think you binomials' wrong, rest looks good though
    I got 60 something for the angle
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    I put my calculator in degree mode for the population one and got 27 years i think, in radians it wouldv'e been too short of a time wouldn't it?
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    (Original post by aero-1997)
    Do you guys think i can get an A* if I have 68-C3 67-C4.
    Probably.
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    Flopped that paper so badly. Does anyone know the requirements for an A & for a B (i.e what UMS do you need/average)?
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    Could someone check this is right please?
    for the last question,
    y= 3^x, dy/dx = 3^xln3
    when x =2 dy/dx = 9ln3
    so tangent=
    y-9=9ln3(x-2)
    y= 9ln3x-18ln3+9
    so it cuts the x axis where
    9ln3x-18ln3+9=0
    9ln3x= 9-18ln3
    ln3x= 1-2ln3
    3x= e^1-2ln3
    3x= e/ln9
    x = e/3ln9
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    (Original post by Fanta4TheBanter)
    Probably.
    Can't say for definite until the grade boundaries are set.
 
 
 
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