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    (Original post by lizard54142)
    Awesome, glad we fixed it in time for tomorrow!

    I forgot to add, but you have to justify taking the positive root: to do this you can draw a sketch graph of y=arcsinx and say "as the graph shows, the gradient is positive at all points, so we take the positive root".

    There is usually one mark for saying this!
    Yeah same, phew!! Yes I got that from the mark scheme! Honestly most of my learning for FP2 has come from the mark schemes 😂

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    Who's doing an all-nighter?
    Just wanna sprint through these papers before the real thing:top:

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    (Original post by Leechayy)
    Who's doing an all-nighter?
    Just wanna sprint through these papers before the real thing:top:

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    No chance, I need my sleep now haha!

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    (Original post by Leechayy)
    Who's doing an all-nighter?
    Just wanna sprint through these papers before the real thing:top:

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    I've done every past paper except the one I'm doing now!

    After that I'm relaxing
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    (Original post by lizard54142)
    I've done every past paper except the one I'm doing now!

    After that I'm relaxing
    I'd do that too if this wasn't my 20th exam:mmm::mmm:


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    Name:  2015-06-21 21_40_34-FP2-A.pdf.png
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    Can anyone explain how to do 2 (b) (ii) ? Where does the \frac{\theta}{2} come from?

    Thanks
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    (Original post by Leechayy)
    I'd do that too if this wasn't my 20th exam:mmm::mmm:


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    20?! :cry:

    You must nearly be done, surely.
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    (Original post by Epistaxis)
    Name:  2015-06-21 21_40_34-FP2-A.pdf.png
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    Can anyone explain how to do 2 (b) (ii) ? Where does the \frac{\theta}{2} come from?

    Thanks
    Hint:

    try factorising out e^{\theta /2 j}
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    (Original post by lizard54142)
    Hint:

    try factorising out e^{\theta /2 j}
    ahh of course, thanks a lot... got it now
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    (Original post by lizard54142)
    20?! :cry:

    You must nearly be done, surely.
    I finish Wednesday, I got no idea how to cram for FPT


    If anyone on the thread is sitting the FPT exam on Wednesday, plez let me know

    So far, I've refreshed my knowledge on everything I learnt prior to exam season.

    I'd finished learning this in class in Feb/March and we did past papers since. I think by April we did them all.

    So I can leave this to the last minute as like I'm just getting myself in the mindset for this exam.

    If all goes well FP2, S2 and FPT could get me an A* :awesome:
    But that's a longshot:mmm:
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    (Original post by Leechayy)
    I finish Wednesday, I got no idea how to cram for FPT


    If anyone on the thread is sitting the FPT exam on Wednesday, plez let me know

    So far, I've refreshed my knowledge on everything I learnt prior to exam season.

    I'd finished learning this in class in Feb/March and we did past papers since. I think by April we did them all.

    So I can leave this to the last minute as like I'm just getting myself in the mindset for this exam.

    If all goes well FP2, S2 and FPT could get me an A* :awesome:
    But that's a longshot:mmm:
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    Did FP3 not go too well? I remember people saying the Differential Geometry question was horrible.

    Where have you applied for and what for? What grades do you need?

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    (Original post by Epistaxis)
    ahh of course, thanks a lot... got it now
    No worries glad you asked this actually because I'd forgotten about that trick, they haven't asked anything like it for a while... might come up tomorrow!
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    (Original post by lizard54142)
    Did FP3 not go too well? I remember people saying the Differential Geometry question was horrible.

    Where have you applied for and what for? What grades do you need?

    Out of all the exams FP3 went horribly. C3 is a bodge up (so many mistakes) but I've done well enough on C4 to still have a possible chance of an A*
    D2 was lovely but didn't get to finish 4 part (i).
    G485 OCR A is borderline A/B and its bothering me + idk my coursework marks either cause my teacher cba...
    Economics went better than expected

    As for making applications, that's an even longer story...
    I even have a seperate thread for it lol
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    I'm off, good luck tomorrow everyone!
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    when doing geometric series how to we know if it sum to infinity or sum of n terms?
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    (Original post by 123BOBBY)
    when doing geometric series how to we know if it sum to infinity or sum of n terms?
    It depends on the common ratio, r:

    If |r| < 1; then you use the sum to infinity. Else, you use the sum to n.

    Also, could someone guide me on using powers of eigenvectors with powers of a matrix? For instance, the questions where you're asked to evaluate \bf{M^3v^3}? Thanks!

    EDIT: I think I got it, in the MEI book it mentions that (\bf{MN})^T = \bf{N}^T\bf{M}^T
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    Well I've certainly refreshed my knowledge but I'm slightly worried about hyperbolics...:hmmm:

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    (Original post by sarcasmrules)
    It depends on the common ratio, r:

    If |r| < 1; then you use the sum to infinity. Else, you use the sum to n.

    Also, could someone guide me on using powers of eigenvectors with powers of a matrix? For instance, the questions where you're asked to evaluate \bf{M^3v^3}? Thanks!

    EDIT: I think I got it, in the MEI book it mentions that (\bf{MN})^T = \bf{N}^T\bf{M}^T
    If v is an eigenvector of M then so is kv where k is any constant.

    So M(Mv) = M(lambda.v) = lambda^2(v)
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    That exam was a dream! Thank the Lord!
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    (Original post by chizz1889)
    That exam was a dream! Thank the Lord!
    Did you get -32 for the product of v?

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