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    (Original post by Gome44)
    That's more like it
    I was working with a mechanics problem with polar coordinates and a very similar ODE arose (slightly easier)


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    So I could not possibly not make this question.
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    (Original post by Gome44)
    How did your step exams go?
    Odd. Think i got grade 1 in step II but grade 2 in III. But lets see. I made a terrible choice of questions in III and was slower then I usually am.
    Wbu?

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    (Original post by TeeEm)
    I just updated the file you are after

    http://madasmaths.com/archive/maths_...transforms.pdf

    this has heaviside function, impulse function and periodic functions.

    hope it is useful.
    YES!! Thanks for this

    going to start learning it in few days after getting a few distractions out the way first
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    (Original post by physicsmaths)
    Odd. Think i got grade 1 in step II but grade 2 in III. But lets see. I made a terrible choice of questions in III and was slower then I usually am.
    Wbu?

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    Didn't do it (was going to sit it for fun but had too many exams this year)
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    33 days to A level results

    Question for Saturday 11/07/15
    AS Level Maths upwards
    Attached Images
  1. File Type: pdf Q12, Saturday, 11-07-15, solution.pdf (72.0 KB, 57 views)
  2. File Type: pdf Q12, Saturday, 11-07-15.pdf (15.1 KB, 60 views)
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    (Original post by TeeEm)
    34 days to A level results

    Question for Friday 10/07/15
    A Level Maths upwards
    Here's the way I did it if you're interested, I think it may be slightly quicker
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    (Original post by Gome44)
    Here's the way I did it if you're interested, I think it may be slightly quicker
    very good indeed!
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    32 days to A level results

    Question for Sunday 12/07/15
    AS Level Maths upwards
    Attached Images
  3. File Type: pdf Q13, Sunday, 12-07-15, solution.pdf (230.0 KB, 68 views)
  4. File Type: pdf Q13, Sunday, 12-07-15.pdf (8.9 KB, 57 views)
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    31 days to A level results

    Question for Monday 13/07/15
    AS Level Maths Upwards
    Attached Images
  5. File Type: pdf Q14, Monday 13-07-15.pdf (9.8 KB, 53 views)
  6. File Type: pdf Q14, Monday 13-07-15, solution.pdf (143.4 KB, 46 views)
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    (Original post by TeeEm)
    31 days to A level results

    Question for Monday 13/07/15
    AS Level Maths Upwards
    Im guessing i cant use AM GM straight


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    (Original post by physicsmaths)
    Im guessing i cant use AM GM straight


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    I have no idea if there are alternatives ...

    From my point of view, as the question ,maker it is difficult to see anything else apart from one method, because I started from the answer and worked "backwards".

    I am guessing this is a hard question, soon to go into my Special papers.
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    (Original post by TeeEm)
    I have no idea if there are alternatives ...

    From my point of view, as the question ,maker it is difficult to see anything else apart from one method, because I started from the answer and worked "backwards".

    I am guessing this is a hard question, soon to go into my Special papers.
    By AM GM arithematic mean>=geometric mean
    Let three numbers be a^3 b^3 b^3
    Rewrite as (a^3+b^3+b^3)/3>=((abb)^3)^1/3
    Simplifies to answer.


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    (Original post by physicsmaths)
    By AM GM arithematic mean>=geometric mean
    Let three numbers be a^3 b^3 b^3
    Rewrite as (a^3+b^3+b^3)/3>=((abb)^3)^1/3
    Simplifies to answer.


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    I guess you can ...

    But there is a method without specialized knowledge.
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    (Original post by TeeEm)
    I guess you can ...

    But there is a method without specialized knowledge.
    Yes I am gona try to do it via that method later on.


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    (Original post by physicsmaths)
    Yes I am gona try to do it via that method later on.


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    24 hours to do it ...Name:  p5.jpg
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    Ok just doing it now. Only took a few minutes without using am-gm aswell haha


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    Sorry but that iff should be if and not if and only if as a,b>0 is sufficient not neccasary.
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    (Original post by TeeEm)
    31 days to A level results

    Question for Monday 13/07/15
    AS Level Maths Upwards
    Wow that was fun AND easy!!! Just gave me a much needed sprinkle of confidence, merci beaucoup! I should start doing these.
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    (Original post by TeeEm)
    33 days to A level results

    Question for Saturday 11/07/15
    AS Level Maths upwards
    I think the forth last step (in the solution) has a "printing" error in it. Otherwise how did the 4/(k+4) turn into a 1/(k+4) . This also may have affected the paper, because then the 1/f(k) inside the bracket should be a 4/f(k) .
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    (Original post by gagafacea1)
    I think the forth last step (in the solution) has a "printing" error in it. Otherwise how did the 4/(k+4) turn into a 1/(k+4) . This also may have affected the paper, because then the 1/f(k) inside the bracket should be a 4/f(k) .
    Silly error thank you for pointing it

    Luckily it did not affect the method.
 
 
 
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