Turn on thread page Beta

Will the real TeeEm please stand up! watch

  • View Poll Results: will the real TeeEm please stand up
    man on the desk
    19
    6.76%
    man in the library with lap top
    69
    24.56%
    man 3
    13
    4.63%
    bodybuilder
    43
    15.30%
    donkey
    52
    18.51%
    man eating sandwich
    25
    8.90%
    ginger
    60
    21.35%

    • Thread Starter
    Offline

    19
    ReputationRep:
    (Original post by aersh8)
    How would you use arctan though?
    what is your level/board?
    Offline

    14
    ReputationRep:
    (Original post by TeeEm)
    what is your level/board?
    Edexcel A2 normal maths, AS further maths
    • Thread Starter
    Offline

    19
    ReputationRep:
    (Original post by aersh8)
    Edexcel A2 normal maths, AS further maths
    then you have more work, in terms of substitutions

    it is easier if you know that d/dx(arctanx) = 1/(1+x2)

    By the way how did you manage these partial fractions if you are at EDEXCEL?
    (they are not covered in their Maths or Further Maths)
    Offline

    14
    ReputationRep:
    (Original post by TeeEm)
    then you have more work, in terms of substitutions

    it is easier if you know that d/dx(arctanx) = 1/(1+x2)

    By the way how did you manage these partial fractions if you are at EDEXCEL?
    (they are not covered in their Maths or Further Maths)
    Alright, my method is right at least I might have another go tomorrow to try doing it without any careless mistakes

    I formed simultaneous equations using different values of x and solved them - we don't need to do that for exam purposes but it works

    Could you please the arctanx thing, seems interesting!
    • Thread Starter
    Offline

    19
    ReputationRep:
    (Original post by aersh8)
    Alright, my method is right at least I might have another go tomorrow to try doing it without any careless mistakes

    I formed simultaneous equations using different values of x and solved them - we don't need to do that for exam purposes but it works

    Could you please the arctanx thing, seems interesting!
    the partial fractions are correct!

    so take it from there when you have a clear head.

    I will put solutions up in a couple of days
    • Thread Starter
    Offline

    19
    ReputationRep:
    (Original post by aersh8)
    Alright, my method is right at least I might have another go tomorrow to try doing it without any careless mistakes

    I formed simultaneous equations using different values of x and solved them - we don't need to do that for exam purposes but it works

    Could you please the arctanx thing, seems interesting!

    PS you did better than any of my current students!...
    hope you have a good exam session after the half term.
    Name:  56.jpg
Views: 109
Size:  11.1 KB
    Offline

    14
    ReputationRep:
    (Original post by TeeEm)
    PS you did better than any of my current students!...
    hope you have a good exam session after the half term.
    Name:  56.jpg
Views: 109
Size:  11.1 KB
    Thanks!
    • Thread Starter
    Offline

    19
    ReputationRep:
    useful material for the upcoming exams

    http://www.thestudentroom.co.uk/show....php?t=3353445

    http://www.thestudentroom.co.uk/show....php?t=3361867

    http://www.thestudentroom.co.uk/show....php?t=3361905
    Offline

    16
    ReputationRep:
    (Original post by TeeEm)
    x
    Name:  Screen Shot 2015-05-29 at 16.52.32.png
Views: 110
Size:  56.1 KB

    Hey can you help me with this question please. I'm really stuck! I can do up to part (c) correctly. But for (d) and (e) I am lost. Please help
    • Thread Starter
    Offline

    19
    ReputationRep:
    (Original post by kprime2)
    Name:  Screen Shot 2015-05-29 at 16.52.32.png
Views: 110
Size:  56.1 KB

    Hey can you help me with this question please. I'm really stuck! I can do up to part (c) correctly. But for (d) and (e) I am lost. Please help
    (d)
    draw lamina in a horizontal position
    mark weight at G, External force, horizontal reaction X at O, vertical reaction Y at O.
    take moments about O
    find external force.
    (e)
    resolve horizontally and vertically
    find X and Y
    find magnitude
    Offline

    17
    ReputationRep:
    Name:  Screen Shot 2015-05-29 at 18.34.41.png
Views: 138
Size:  40.8 KB

    Any ideas why you can't use the residue theorem?
    • Thread Starter
    Offline

    19
    ReputationRep:
    (Original post by rayquaza17)
    Name:  Screen Shot 2015-05-29 at 18.34.41.png
Views: 138
Size:  40.8 KB

    Any ideas why you can't use the residue theorem?
    I am not a purist but logz has a branch cut which prevents you to do this for a "second turn" around the circle.
    (it is like going up a spiral staircase, so you cannot close your contour)
    Offline

    17
    ReputationRep:
    (Original post by TeeEm)
    I am not a purist but logz has a branch cut which prevents you to do this for a "second turn" around the circle.
    (it is like going up a spiral staircase, so you cannot close your contour)
    I see, thanks!

    Oh and thanks again for all of your help this year. My last non-stats exam is tomorrow so you won't be pestered by any questions from me for a while!
    • Thread Starter
    Offline

    19
    ReputationRep:
    (Original post by rayquaza17)
    I see, thanks!

    Oh and thanks again for all of your help this year. My last non-stats exam is tomorrow so you won't be pestered by any questions from me for a while!
    no worries
    • Thread Starter
    Offline

    19
    ReputationRep:
    Two brand new differential equations with related rates of change suitable for EDEXCEL students mainly.
    They were made in one of my revision lesson today, and are of "general consumption difficulty" as my student finds the topic hard.
    • Thread Starter
    Offline

    19
    ReputationRep:
    Two brand new differential equations with related rates of change suitable for EDEXCEL students mainly.
    They were made in one of my revision lesson today, and are of "general consumption difficulty" as my student finds the topic hard. Solutions on Sunday
    Attached Images
  1. File Type: pdf NEW ODE 1.pdf (19.3 KB, 69 views)
  2. File Type: pdf NEW ODE 2.pdf (19.8 KB, 83 views)
    • Thread Starter
    Offline

    19
    ReputationRep:
    Two brand new integration suitable for able students mainly.
    They were made in one of lessons today.
    Solutions on Sunday Evening
    Attached Images
  3. File Type: pdf NEW.PDF (15.9 KB, 74 views)
    Offline

    14
    ReputationRep:
    Hi again! I did the C3 paper T you have on your website, where does a score of around 50-51/75 (I used the fraction of how far I got through a solution to estimate how much I got for that question) stand in your opinion?
    Also I think there's a simpler way of solving 5 (although it may just seem simpler to me)

    Thanks for making those!

    Edit: I only spent an hour on it though, do you think that some more fiddling during the allowed time limits would have lead to a better score?
    • Thread Starter
    Offline

    19
    ReputationRep:
    (Original post by aersh8)
    Hi again! I did the C3 paper T you have on your website, where does a score of around 50-51/75 (I used the fraction of how far I got through a solution to estimate how much I got for that question) stand in your opinion?
    Also I think there's a simpler way of solving 5 (although it may just seem simpler to me)

    Thanks for making those!

    Edit: I only spent an hour on it though, do you think that some more fiddling during the allowed time limits would have lead to a better score?
    It is very hard to judge ordinary exam performance based on these two unique papers (S and T).

    "ordinary maths students" can still get full marks in the actual exam and get sub30 scores in this paper.

    similarly a "top maths student" can score very high 60+ and miss full marks on the actual due to some silly error.

    PS
    many questions can be done in more than one way.
    If mathematically correct then full marks!
    Offline

    14
    ReputationRep:
    (Original post by TeeEm)
    It is very hard to judge ordinary exam performance based on these two unique papers (S and T).

    "ordinary maths students" can still get full marks in the actual exam and get sub30 scores in this paper.

    similarly a "top maths student" can score very high 60+ and miss full marks on the actual due to some silly error.

    PS
    many questions can be done in more than one way.
    If mathematically correct then full marks!
    I see would a score of 50 be okish for this paper, or is it weak (not related to edexcel exams)?

    Posted from TSR Mobile
 
 
 
Reply
Submit reply
Turn on thread page Beta
Updated: August 22, 2017

University open days

  1. Loughborough University
    General Open Day Undergraduate
    Fri, 21 Sep '18
  2. University of Cambridge
    Churchill College Undergraduate
    Fri, 21 Sep '18
  3. Richmond, The American International University in London
    Undergraduate Open Day Undergraduate
    Fri, 21 Sep '18
Poll
Which accompaniment is best?

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Write a reply...
Reply
Hide
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.