Hey there! Sign in to join this conversationNew here? Join for free
    Offline

    0
    ReputationRep:
    (Original post by L'Evil Fish)
    S3?!
    yeah for afm lol
    (Original post by keromedic)
    ??
    Ah cool, so you've cut back on the STEP Qs a bit.
    well I was generally doing one a day so not really
    • TSR Support Team
    • Very Important Poster
    • Reporter Team
    • Welcome Squad
    Offline

    19
    ReputationRep:
    (Original post by Robbie242)
    yeah for afm lol

    well I was generally doing one a day so not really
    Ah, thought you had gone up to 2 a day, 3 on weekends.
    Online

    11
    ReputationRep:
    A2 mathematicians help me with this ? I'm really really stuck on it!
    Find the inverse function of f(x) = x^2(4-x) and tell me how you do it please ? I'm up to the bit where it's x= y^2(4-y)








    Posted from TSR Mobile
    • Peer Support Volunteers
    • Clearing and Applications Advisor
    • Study Helper
    Offline

    19
    (Original post by krishkmistry)
    A2 mathematicians help me with this ? I'm really really stuck on it!
    Find the inverse function of f(x) = x^2(4-x) and tell me how you do it please ? I'm up to the bit where it's x= y^2(4-y)
    Posted from TSR Mobile
    Where did you get that question from? I can't see an easy way to do it tbh. :no:
    Offline

    3
    ReputationRep:
    (Original post by krishkmistry)
    A2 mathematicians help me with this ? I'm really really stuck on it!
    Find the inverse function of f(x) = x^2(4-x) and tell me how you do it please ? I'm up to the bit where it's x= y^2(4-y)








    Posted from TSR Mobile
    Make y the subject again

    Posted from TSR Mobile
    Online

    11
    ReputationRep:
    (Original post by Qari)
    Make y the subject again

    Posted from TSR Mobile
    I don't know how to!!!


    Posted from TSR Mobile
    Online

    11
    ReputationRep:
    (Original post by usycool1)
    Where did you get that question from? I can't see an easy way to do it tbh. :no:
    Name:  ImageUploadedByStudent Room1388172228.944963.jpg
Views: 82
Size:  158.9 KB
    Part (iv)


    Posted from TSR Mobile
    • Peer Support Volunteers
    • Clearing and Applications Advisor
    • Study Helper
    Offline

    19
    (Original post by krishkmistry)
    Name:  ImageUploadedByStudent Room1388172228.944963.jpg
Views: 82
Size:  158.9 KB
    Part (iv)


    Posted from TSR Mobile
    Ah that makes more sense.

    Well, if y = f(x), the inverse function, f^{-1}(x) is a reflection of the original function across y = x. So you basically take the reciprocal of the gradient of the original function.
    Online

    11
    ReputationRep:
    (Original post by usycool1)
    Ah that makes more sense.

    Well, if y = f(x), the inverse function, f^{-1}(x) is a reflection of the original function across y = x. So you basically take the reciprocal of the gradient of the original function.
    So I've spent 3 hours trying to solve it and all it took was that - WHY ?!

    Major thankyou btw ! You're always the hero


    Posted from TSR Mobile
    Online

    11
    ReputationRep:
    (Original post by usycool1)
    Ah that makes more sense.

    Well, if y = f(x), the inverse function, f^{-1}(x) is a reflection of the original function across y = x. So you basically take the reciprocal of the gradient of the original function.
    So are you saying find the gradient of the original dy/dx of f(x) by sticking 7/8 into the function and find the reciprocal of the answer you get ?


    Posted from TSR Mobile
    Online

    11
    ReputationRep:
    Got the answerrrr thanks usycool1


    Posted from TSR Mobile
    Offline

    2
    ReputationRep:
    (Original post by L'Evil Fish)
    ...
    Decided to take your advice! :holmes:

    (Original post by usycool1)
    ...
    Hey usy, would you mind editing my university choices? I've put it in the correct format so it's not that much of a hassle for you.
    Spoiler:
    Show

    Felix Felicis
    AS Subjects: Maths, Further maths, Physics, Chemistry, Geography, Additional Further Maths
    A2 Subjects: Maths, Further maths, Physics, Chemistry
    University choices: Cambridge, Imperial, Bristol, Bath, Nottingham.

    (This is for Mechanical Engineering)
    • Peer Support Volunteers
    • Clearing and Applications Advisor
    • Study Helper
    Offline

    19
    (Original post by krishkmistry)
    Got the answerrrr thanks usycool1


    Posted from TSR Mobile
    No worries!

    (Original post by Felix Felicis)
    Hey usy, would you mind editing my university choices? I've put it in the correct format so it's not that much of a hassle for you.
    Spoiler:
    Show

    Felix Felicis
    AS Subjects: Maths, Further maths, Physics, Chemistry, Geography, Additional Further Maths
    A2 Subjects: Maths, Further maths, Physics, Chemistry
    University choices: Cambridge, Imperial, Bristol, Bath, Nottingham.

    (This is for Mechanical Engineering)
    Sure thing...mechanical engineering now?
    Online

    11
    ReputationRep:
    made a blog about the last leg of my journey through a levels and my attempt to turn around my grades,followed are appreciated if you have tumblr or id encourage you to at least take a look
    http://thejourneythrougheducation.tumblr.com/
    Offline

    2
    ReputationRep:
    Fighting the urge to make my own 'ask me anything' thread haha.
    Offline

    0
    ReputationRep:
    (Original post by mynameisntbobk)
    Fighting the urge to make my own 'ask me anything' thread haha.
    haha I've being doing that for quite some time
    Offline

    2
    ReputationRep:
    (Original post by usycool1)
    Sure thing...mechanical engineering now?


    :pierre:

    For quite some time now, actually. I didn't apply for maths, ultimately, but have only gotten around to changing this now.
    Offline

    0
    ReputationRep:
    (Original post by Felix Felicis)


    :pierre:

    For quite some time now, actually. I didn't apply for maths, ultimately, but have only gotten around to changing this now.
    I actually had no idea :lol:
    Offline

    18
    ReputationRep:
    (Original post by Felix Felicis)
    Decided to take your advice! :holmes:


    Hey usy, would you mind editing my university choices? I've put it in the correct format so it's not that much of a hassle for you.
    Spoiler:
    Show

    Felix Felicis
    AS Subjects: Maths, Further maths, Physics, Chemistry, Geography, Additional Further Maths
    A2 Subjects: Maths, Further maths, Physics, Chemistry
    University choices: Cambridge, Imperial, Bristol, Bath, Nottingham.

    (This is for Mechanical Engineering)
    Well done
    Offline

    2
    ReputationRep:
    (Original post by Robbie242)
    haha I've being doing that for quite some time
    Haha I would have thought you'd have done one already, although I can imagine all the hate you'd get :lol:
 
 
 
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • Poll
    Did TEF Bronze Award affect your UCAS choices?
    Help with your A-levels

    All the essentials

    The adventure begins mug

    Student life: what to expect

    What it's really like going to uni

    Rosette

    Essay expert

    Learn to write like a pro with our ultimate essay guide.

    Uni match

    Uni match

    Our tool will help you find the perfect course for you

    Study planner

    Create a study plan

    Get your head around what you need to do and when with the study planner tool.

    Study planner

    Resources by subject

    Everything from mind maps to class notes.

    Hands typing

    Degrees without fees

    Discover more about degree-level apprenticeships.

    A student doing homework

    Study tips from A* students

    Students who got top grades in their A-levels share their secrets

    Study help links and info

    Can you help? Study help unanswered threadsRules and posting guidelines

    Sponsored content:

    HEAR

    HEAR

    Find out how a Higher Education Achievement Report can help you prove your achievements.

    Groups associated with this forum:

    View associated groups
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • 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

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