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%

    Offline

    10
    ReputationRep:
    (Original post by TeeEm)
    I made another "pair" today with a square root instead of the exponential.
    As a challenge see if you can write an analogous pair of questions.
    Are you training us into little TeeEm's?
    • Thread Starter
    Offline

    19
    ReputationRep:
    (Original post by Gome44)
    Are you training us into little TeeEm's?
    I am trying...

    To make the question, is a more advanced mathematical skill than to to solve it ...
    Offline

    18
    ReputationRep:
    (Original post by TeeEm)
    I made another "pair" today with a square root instead of the exponential.
    As a challenge see if you can write an analogous pair of questions.
    What does analogous meAn?


    Posted from TSR Mobile
    • Thread Starter
    Offline

    19
    ReputationRep:
    (Original post by physicsmaths)
    What does analogous meAn?


    Posted from TSR Mobile
    when I made the question yesterday I started with y = ex/(1+ex)
    I made the first question to find the derivative in terms of y

    Then for the ODE I differentiated the derivative and wrote everything in terms of y again. I gave this as the second question (with some conditions to make the numbers nice)

    Then I started experimenting with "harder drugs"
    I started with y = √x / (1 + √x)
    I made the another "first question" to find the derivative in terms of y
    Then I made "another second question"

    I did not give this second pair as the solution to the second is not nice ...

    all clear?
    • Community Assistant
    Offline

    17
    ReputationRep:
    Community Assistant
    (Original post by physicsmaths)
    What does analogous meAn?


    Posted from TSR Mobile
    Means "like" or similar but when you compare two different things.

    So something could have a property and something else could have a property that follows the same sort of idea but isn't the same.

    Easier with an example but I can't think of one lol


    Posted from TSR Mobile
    Offline

    10
    ReputationRep:
    (Original post by gagafacea1)
    What method did you use?
    Solution to the extra
    Attached Images
     
    Offline

    2
    ReputationRep:
    (Original post by TeeEm)
    I made another "pair" today with a square root instead of the exponential.
    As a challenge see if you can write an analogous pair of questions.
    This...

    Edit: Updated the file, put more hints and added an extension question.
    Attached Images
  1. File Type: pdf GeneiRyodan.pdf (56.4 KB, 34 views)
    • Thread Starter
    Offline

    19
    ReputationRep:
    (Original post by gagafacea1)
    This...
    looks interesting

    my holiday after dinner homework, for tonight
    Offline

    2
    ReputationRep:
    (Original post by TeeEm)
    looks interesting

    my holiday after dinner homework, for tonight
    Oh and ignore the first hint, I changed the question in the end so that you don't need it.
    Offline

    10
    ReputationRep:
    (Original post by TeeEm)
    I made another "pair" today with a square root instead of the exponential.
    As a challenge see if you can write an analogous pair of questions.
    Warning: It's absolutely brutal.

    It took me about 25 mins to get from the answer to the D.E, but 4 hours to get from the D.E to the answer. Good luck

    I'll post the solution tomorrow if requested
    Attached Images
     
    Offline

    2
    ReputationRep:
    (Original post by Gome44)
    Warning: It's absolutely brutal.

    It took me about 25 mins to get from the answer to the D.E, but 4 hours to get from the D.E to the answer. Good luck

    I'll post the solution tomorrow if requested
    okay but where is the first part?
    • Thread Starter
    Offline

    19
    ReputationRep:
    (Original post by Gome44)
    Warning: It's absolutely brutal.

    It took me about 25 mins to get from the answer to the D.E, but 4 hours to get from the D.E to the answer. Good luck

    I'll post the solution tomorrow if requested
    I have already done it.

    I wrote the ODE a bit better/ neater but that is still very hard to tidy to the answer, which of course I knew what it was ...

    it is because it is brutal to tidy (and beautiful at the same time) I chose not to post that one last night....

    let us see how many will manage it
    Offline

    10
    ReputationRep:
    (Original post by gagafacea1)
    okay but where is the first part?
    There is no first part mwhahahahaha
    • Thread Starter
    Offline

    19
    ReputationRep:
    (Original post by gagafacea1)
    okay but where is the first part?
    (Original post by Gome44)
    Warning: It's absolutely brutal.

    It took me about 25 mins to get from the answer to the D.E, but 4 hours to get from the D.E to the answer. Good luck

    I'll post the solution tomorrow if requested
    I assume it is y = √x / (1 + √x)
    Offline

    10
    ReputationRep:
    (Original post by TeeEm)
    I have already done it.

    I wrote the ODE a bit better/ neater but that is still very hard to tidy to the answer, which of course I knew what it was ...

    it is because it is brutal to tidy (and beautiful at the same time) I chose not to post that one last night....

    let us see how many will manage it
    How did you write it? My way the integration is quite messy, as you have to come up with a lot of substitutions. Also, I had to use Wikipedia for a trig formula...
    Offline

    10
    ReputationRep:
    (Original post by TeeEm)
    I assume it is y = √x / (1 + √x)
    Nope
    • Thread Starter
    Offline

    19
    ReputationRep:
    (Original post by Gome44)
    Nope
    (Original post by Gome44)
    How did you write it? My way the integration is quite messy, as you have to come up with a lot of substitutions. Also, I had to use Wikipedia for a trig formula...
    then I take back what I said as I assumed you did y = √x / (1 + √x)
    Offline

    2
    ReputationRep:
    (Original post by Gome44)
    There is no first part mwhahahahaha
    You are a mean boy who is just being mean!
    • Thread Starter
    Offline

    19
    ReputationRep:
    (Original post by Gome44)
    Warning: It's absolutely brutal.

    It took me about 25 mins to get from the answer to the D.E, but 4 hours to get from the D.E to the answer. Good luck

    I'll post the solution tomorrow if requested
    I will have a go at yours and gagaface1, this evening

    Can you confirm in the condition x=11/2 ?
    Offline

    10
    ReputationRep:
    (Original post by TeeEm)
    I will have a go at yours and gagaface1, this evening

    Can you confirm in the condition x=11/2 ?
    Sorry, it's π/2, my handwriting is just really bad
 
 
 
Reply
Submit reply
Turn on thread page Beta
Updated: August 22, 2017

1,070

students online now

800,000+

Exam discussions

Find your exam discussion here

Poll
Should universities take a stronger line on drugs?

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.