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Edexcel FP3 - 27th June, 2016 watch

  • View Poll Results: How did you find the Edexcel FP3 exam?
    Very hard
    41
    8.40%
    Hard
    69
    14.14%
    Normal
    156
    31.97%
    Easy
    165
    33.81%
    Very easy
    57
    11.68%

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    (Original post by Zacken)
    Yep! Bang on - hope the question makes more sense now.
    Will rep when TSR allows me to, cheers.
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    (Original post by Zacken)
    yeh, I agree. It's all so formulaic and mechanical.
    I must be weird, vectors and matrices are my favourite topics from FP3 haha!

    Just as well, heading into Computer Science next year hopefully
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    (Original post by CALI1198)
    I must be weird, vectors and matrices are my favourite topics from FP3 haha!

    Just as well, heading into Computer Science next year hopefully
    Oh, no - don't get me wrong, they're incredibly amazing topics in their own right, it's just that so little is taught at FP3 and so crappily as well that it's an utter bore and just requires no thought at all other than do this and that, you don't get the cool things like vector spaces, etc...
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    Hi does anyone know whether the answers for integration questions have to be in exact form if they don't specify what form they want the answer in? My calculator tends to give answers as decimals especially when the question involves lots of natural logs and hyperbolic functions so it'd be very inconvenient for me to find the exact form as I'd have to do it the long way.
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    (Original post by John Fluffy Bunny)
    Hi does anyone know whether the answers for integration questions have to be in exact form if they don't specify what form they want the answer in? My calculator tends to give answers as decimals especially when the question involves lots of natural logs and hyperbolic functions so it'd be very inconvenient for me to find the exact form as I'd have to do it the long way.
    Yeaah, I'm pretty sure the exact form is required because they want you to do it the long way.
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    (Original post by John Fluffy Bunny)
    Hi does anyone know whether the answers for integration questions have to be in exact form if they don't specify what form they want the answer in? My calculator tends to give answers as decimals especially when the question involves lots of natural logs and hyperbolic functions so it'd be very inconvenient for me to find the exact form as I'd have to do it the long way.
    Exact form means you'll have to work each term in your brackets out rather than chucking it all in

    Sent from my One using Tapatalk
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    (Original post by Zacken)
    Yeaah, I'm pretty sure the exact form is required because they want you to do it the long way.
    I've only encountered problems with simplifying the result in question 51 on page 99 (review exercise 1) as sinh(4ln(root2+1) is very hard to simplify. I hope this is some old spec question because it's a beast. In fact the whole review exercise is a big pain in the ass for me
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    (Original post by John Fluffy Bunny)
    I've only encountered problems with simplifying the result in question 51 on page 99 (review exercise 1) as sinh(4ln(root2+1) is very hard to simplify. I hope this is some old spec question because it's a beast. In fact the whole review exercise is a big pain in the ass for me
    It tidies up neatly to 12\sqrt{2}, doesn't it?
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    (Original post by Zacken)
    It tidies up neatly to 12\sqrt{2}, doesn't it?
    You are right. My calculator gives it as 16.97... only (I'm using Casio fx 83gt plus). What's the process that you use to get it in that form if you don't mind me asking? I tried using the exponential definition of sinh X to get it but then I got stuck on the part with (root2 +1)^4 as something tells me there's too much work involved for it to be the right way to go about it.
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    (Original post by John Fluffy Bunny)
    You are right. My calculator gives it as 16.97... only (I'm using Casio fx 83gt plus). What's the process that you use to get it in that form if you don't mind me asking? I tried using the exponential definition of sinh X to get it but then I got stuck on the part with (root2 +1)^4 as something tells me there's too much work involved for it to be the right way to go about it.
    I used the exponential definition to get \frac{1}{2}((\sqrt{2} + 1)^2 + (\sqrt{2} + 1)^{-1}) and plugged that into my calculator and realised it was \frac{1}{2}(24\sqrt{2}).
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    Managed to get my first A* in FP3 today with the June 2012, hardly surprising though, 90 UMS was 70/75! I managed 73/75; quite an easy paper. I hope we're blessed with a paper of the same difficulty this year too

    Combined with my FP2 June 2012, I would've got 144/150
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    (Original post by edothero)
    Managed to get my first A* in FP3 today with the June 2012, hardly surprising though, 90 UMS was 70/75! I managed 73/75; quite an easy paper. I hope we're blessed with a paper of the same difficulty this year too

    Combined with my FP2 June 2012, I would've got 144/150
    Oh, wow. Well done! :woo:
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    (Original post by Zacken)
    Oh, wow. Well done! :woo:
    Thanks
    I find FP3 more tricky than FP2 due to it being less predictable, so I'm very happy with this result

    How is STEP coming along?
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    (Original post by edothero)
    Thanks
    I find FP3 more tricky than FP2 due to it being less predictable, so I'm very happy with this result
    Certainly, I think everybody would agree. FP2 has milder topics as well. :yep:

    How is STEP coming along?
    So-so, I suppose. Not very confident, just hoping to scrape my offer really.
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    (Original post by Zacken)
    So-so, I suppose. Not very confident, just hoping to scrape my offer really.
    Sounds like me for M2 :laugh:

    I'm sure you'll do well. And I'm definitely sure you'll end up at Cambridge come results day
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    Need some help on this question (well, part B), it's driving me nuts

    A) Differentiate wrt x

    x^{n-1}\sqrt{(x^{2}+1)}

    My answer:

    Spoiler:
    Show
    (n-1)x^{n-2} + \dfrac{x^{n}}{\sqrt{x^{2}+1}}


    B) Given that

    I_{n} = \displaystyle \int \dfrac{x^{n}}{\sqrt{(x^{2}+1)}}

    using your answer to A or otherwise, show that

    nI_{n} + (n-1)I_{n-2} = x^{n-1}\sqrt{(x^{2}+1)}
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    What graphs are required for fp3???
    And what shape properties
    i am on aqa, exam tomorrow
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    (Original post by edothero)
    Need some help on this question (well, part B), it's driving me nuts

    A) Differentiate wrt x

    x^{n-1}\sqrt{(x^{2}+1)}

    My answer:
    Spoiler:
    Show
    (n-1)x^{n-2} + \dfrac{x^{n}}{\sqrt{x^{2}+1}}


    B) Given that

    I_{n} = \displaystyle \int \dfrac{x^{n}}{\sqrt{(x^{2}+1)}}

    using your answer to A or otherwise, show that

    nI_{n} + (n-1)I_{n-2} = x^{n-1}\sqrt{(x^{2}+1)}
    Your derivative is wrong, I believe.
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    (Original post by edothero)
    Need some help on this question (well, part B), it's driving me nuts

    A) Differentiate wrt x
    Forgotten your product rule?
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    (Original post by EricPiphany)
    Your derivative is wrong, I believe.
    (Original post by Zacken)
    Forgotten your product rule?
    :lol::lol::lol::lol::lol::lol:
 
 
 
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