AQA Core 4 Exam Discussion 14/06/2012 !Poll, paper and unofficial MS (first post)!
Maths exam discussion - share revision tips in preparation for GCSE, A Level and other maths exams and discuss how they went afterwards.
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View Poll Results: How did you find the exam?
Pshh I could do it in my sleep! 14 5.56% Went pretty well 
29 11.51% It was okay... (maybe made silly mistakes?) 82 32.54% 
62 24.60% I died. 61 24.21% Fine I guess, couldn't careless. 4 1.59%
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Re: AQA Core 4 Exam Discussion 14/06/2012I firmed for Warwick; computer-science(Original post by LGrosvenor101)
And oh... I think I remember speaking to you before, again, cannot remember what about! and yes! Warwick for Chemistry xD Sorry, I cannot remember where you said you were going
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Re: AQA Core 4 Exam Discussion 14/06/2012thatnks for expaining.(Original post by mojopin1)
I can't really remember now but you first had to differentiate the equation, one part of it needed the product rule. Then you make your dy/dx = 0. Bottom lines cancels and you're left with Y=... Sub that back into the original equation and you get a quadratic which you have to factor, then you get +- 1/3. Then sub these back into your Y=... to get the stationary points.
that sounds pretty hard, so i don't think i would of managed all that under exam pressure anyway. I differentiated it correctly, i think but thats where i got stuck
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Re: AQA Core 4 Exam Discussion 14/06/2012I don't know, I just never really got them(Original post by SomeoneIveNeverMet)
Was is |x|<4? Because that's what I put but a few have been saying otherwise haha oh well, it was 1 mark. I never really got them either! That's why if that isn't the answer, I haven't a clue how to get to the answer haha.
Oh I made a silly mistake with the px^2(4-x^2)...on the last line (for some STUPID reason) instead of writing 9/4, I multiplied 9 by 4 and wrote 36 (*facepalm*).
I know that vector question my heart was pounding! I hate vectors, so so much. And then with all the fractions I really thought it was wrong xD
I knew it was Warwick! Woooo! Hahaha my memory isn't so bad after all What grades do you need?
That's okay UCL for Civil Engineering, need A*AA (ouch )
:L and I made that silly mistake too! For some reason I just left it as 9x^2(4-x^2) not sure how many marks I would lose :L
I was so pleased I understood vectors! I never really got it until a couple of days ago, and I am so glad that I nice vectors question came up! xD and lol I need AAB in Maths and Chemistry, and ouch what do you think you will get at the moment? and how many more exams do you have? 
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Re: AQA Core 4 Exam Discussion 14/06/2012CRAP. Ah jesus christ, I've just realised this. My M2 resit needs to go REALLY well now.(Original post by greenfro)
love that i messed up on the first question!!
i only got half of b as i didnt divide my -5 by 2x+1 haha oops! Need a B
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Re: AQA Core 4 Exam Discussion 14/06/2012yes, you're right(Original post by Rotravis)
Where does the 5/2 ln (2x+1) come from? Doesn't the bottom (2x+1) cancel out with the factor on the top, leaving you with 2x^2-x+3? -
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Re: AQA Core 4 Exam Discussion 14/06/2012I think I forgot the -5 remainder.(Original post by SomeoneIveNeverMet)
yes, you're right
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Lets be honest, you got AT LEAST 99UMS(Original post by Cath-ay)
after looking through this paper again... maybe I didn't do as bad as I think I did. Still would like grade boundaries as low as last june *PRAYS*
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Re: AQA Core 4 Exam Discussion 14/06/2012Not yet, got one more exam to go then I will(Original post by LGrosvenor101)
Oh cool! What do you need? and have you applied for accommodation yet?
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Re: AQA Core 4 Exam Discussion 14/06/2012Ah look at us making silly mistakes(Original post by LGrosvenor101)
I don't know, I just never really got them :L and I made that silly mistake too! For some reason I just left it as 9x^2(4-x^2) not sure how many marks I would lose :L
I was so pleased I understood vectors! I never really got it until a couple of days ago, and I am so glad that I nice vectors question came up! xD and lol I need AAB in Maths and Chemistry, and ouch what do you think you will get at the moment? and how many more exams do you have?
sad times. I'm hoping it's no more than 1 or 2 marks (it was out of 6/7 marks I think, and that mistake was made on the very last line). Haha yeah I'm so so glad it was a nice vector question! Vectors were definitely my biggest worry.
What other subjects do you do?
Hmm, worst case, AAB, best case A*A*A ... other than that, I really can't tell
How about you?
I only have M2 left!
you?
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Re: AQA Core 4 Exam Discussion 14/06/2012You would. There was nothing else to add really.(Original post by ReTurd)
That was worth 3 marks for some reason..
All i did was write that as the answer and no working or anything, would i get all 3 marks? -
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Re: AQA Core 4 Exam Discussion 14/06/2012D2(Original post by LGrosvenor101)
Oh cool, which exam? I've still got 4 and yeah I did mine a while back, put (in preference order) Arthur Vick, Sherbourne, Bluebell, Rootes and Whitefields (???)
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Good luck!
Sounds good.
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:L and I made that silly mistake too! For some reason I just left it as 9x^2(4-x^2) not sure how many marks I would lose 
![(4-x)^{\dfrac{-1}{2}} = \dfrac{1}{2} (1-\dfrac{x}{4})^{\dfrac{-1}{2}}
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\approx \dfrac{1}{2} + \dfrac{x}{16} + \dfrac{3x^2}{256}](http://www.thestudentroom.co.uk/latexrender/pictures/90/902fc24801e9f6700456104d185a7324.png "(4-x)^{\dfrac{-1}{2}} = \dfrac{1}{2} (1-\dfrac{x}{4})^{\dfrac{-1}{2}}
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\approx \dfrac{1}{2} + \dfrac{x}{16} + \dfrac{3x^2}{256}")
![When V_B = V_W (Then\ round\ up.)
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(1.03)^T = 1.5(1.015)^T
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T ln (1.03) = ln1.5(1.015)^T = ln1.5 + Tln(1.015) \Rightarrow T = 27.6,\ round\ up\ to\ 28\ years.](http://www.thestudentroom.co.uk/latexrender/pictures/82/827e7741bbd21b9b218d32c37868478f.png "When V_B = V_W (Then\ round\ up.)
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(1.03)^T = 1.5(1.015)^T
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T ln (1.03) = ln1.5(1.015)^T = ln1.5 + Tln(1.015) \Rightarrow T = 27.6,\ round\ up\ to\ 28\ years.")
you?
