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

Core 4 Differentiation

Announcements Posted on
    • 0 followers
    Offline

    ReputationRep:
    (Original post by raheem94)
    I am doing A-Level further maths, i already have an A* in A-Level maths, TenOfThem is a teacher, so who are you referring to people who won't be giving correct advice and are not experts in maths?

    We don't have so much spare time to give people wrong advice.
    getting an a* in maths doesnt make you an expert in maths, instead it just means that you have learnt your alevel maths syllabus to a good enough extent that allows you do to well in your a level exams and get an a*


    an expert in maths is someone who has got a degree in maths i.e your maths teacher.

    im not saying that people on here are stupid or anything but not everyone on here may be giving the correct advice so just ask your maths teacher if you want to be 100% certain
    • 51 followers
    Offline

    ReputationRep:
    (Original post by brownieboy)

    an expert in maths is someone who has got a degree in maths i.e your maths teacher.
    What proportion of maths teachers do you think have a degree in maths


    (Original post by brownieboy)

    im not saying that people on here are stupid or anything but not everyone on here may be giving the correct advice so just ask your maths teacher if you want to be 100% certain
    You are correct that people give poor advice sometimes, it is ironic that the only poor advice on this thread was given by you
    • 47 followers
    Offline

    ReputationRep:
    (Original post by TenOfThem)
    You are correct that people give poor advice sometimes, it is ironic that the only poor advice on this thread was given by you
    So true .
    • 47 followers
    Offline

    ReputationRep:
    (Original post by brownieboy)
    im not saying that people on here are stupid or anything but not everyone on here may be giving the correct advice so just ask your maths teacher if you want to be 100% certain
    By the way, can you give an example of wrong advice being given on the maths forum. Its extremely rare on TSR.

    For me asking my maths teacher rarely works out because all of my maths teachers are reluctant to attempt the questions i give them, because most of them are difficult questions. So TSR is the more helpful resource for me, at least you get an answer as most people give it a go.
    • 0 followers
    Offline

    ReputationRep:
    (Original post by TenOfThem)
    What proportion of maths teachers do you think have a degree in maths




    You are correct that people give poor advice sometimes, it is ironic that the only poor advice on this thread was given by you
    to be a maths teacher you need a degree in maths you fool.

    how am i giving poor advice? all im saying is that it is better to ask questions re maths problems to your teacher, than asking people on a forum page.

    do you disagree?
    • 16 followers
    Offline

    ReputationRep:
    (Original post by brownieboy)
    to be a maths teacher you need a degree in maths you fool.
    Incorrect.

    how am i giving poor advice? all im saying is that it is better to ask questions re maths problems to your teacher, than asking people on a forum page.
    Your advice was woefully poor - this forum is full of Maths 'experts', though helping with a question like this requires no expertise, just a thorough understanding of C4 trig.
    • 15 followers
    Offline

    ReputationRep:
    (Original post by brownieboy)
    to be a maths teacher you need a degree in maths you fool.

    how am i giving poor advice? all im saying is that it is better to ask questions re maths problems to your teacher, than asking people on a forum page.

    do you disagree?
    Wrong.

    'Tenofthem' is a maths teacher (I'm assuming) so I think she knows what she's talking about

    Plus, my own maths teacher has his degree in Economics, and my Further Maths teacher has a degree in Physics, so this kinda blows your idea out of the water.

    Anyway, students may have different ways of doing things or might be able to explain things in a way that people understand so it's not really a bad idea to ask on a forum, particularly if you won't be seeing your maths teacher for another 2 weeks!
    • 51 followers
    Offline

    ReputationRep:
    (Original post by brownieboy)
    to be a maths teacher you need a degree in maths you fool.
    Oh dear ... how naive



    (Original post by brownieboy)
    how am i giving poor advice?
    Post 11 was complete nonsense
    • 7 followers
    Offline

    ReputationRep:
    please help me someone..well this isnt differentiation..it's binomial expansion..how do i work out binomial expansion of 3 / 2-3x ? i worked it out but the answer was different : mark scheme stated it's equal to 1/2 (1 - 3/2 x) to power -1 ... dont understand
    • 70 followers
    Offline

    ReputationRep:
    (Original post by Raj K)
    please help me someone..well this isnt differentiation..it's binomial expansion..how do i work out binomial expansion of 3 / 2-3x ? i worked it out but the answer was different : mark scheme stated it's equal to 1/2 (1 - 3/2 x) to power -1 ... dont understand
    First rewrite 3 / 2-3x as 3(2-3x)^-1
    Next take out the two to give 3.2^-1(1-1.5x)^-1 (I used 1.5 'cos fractions fail on the internet :P

    Now you should have 1.5(1-1.5x)^-1

    1.5 [ a + nx + blah blah blah] should give you your answer.
    • 51 followers
    Offline

    ReputationRep:
    Perhaps it would have been better to start a new thread


    \frac{3}{2-3x} = 3(2-3x)^{-1}


    (2-3x)^{-1} = 2^{-1}(1-\frac{3x}{2})^{-1}= \frac{1}{2}(1-\frac{3x}{2})^{-1}


    therefore


    \frac{3}{2-3x} = \frac{3}{2}(1-\frac{3x}{2})^{-1}
    • 70 followers
    Offline

    ReputationRep:
    (Original post by TenOfThem)
    Perhaps it would have been better to start a new thread


    \frac{3}{2-3x} = 3(2-3x)^{-1}


    (2-3x)^{-1} = 2^{-1}(1-\frac{3x}{2})^{-1}= \frac{1}{2}(1-\frac{3x}{2})^{-1}


    therefore


    \frac{3}{2-3x} = \frac{3}{2}(1-\frac{3x}{2})^{-1}
    How do you do that maths notation stuff?
    Just trying it out below, it's probably going to be a mess though :P :

     \frac{Pi}{17}(1-sin^{2}theta)

    Edit: haha it worked, but I don't know how to do anything else. Is there a guide anywhere?
    • 7 followers
    Offline

    ReputationRep:
    (Original post by Junaid96)
    First rewrite 3 / 2-3x as 3(2-3x)^-1
    Next take out the two to give 3.2^-1(1-1.5x)^-1 (I used 1.5 'cos fractions fail on the internet :P

    Now you should have 1.5(1-1.5x)^-1

    1.5 [ a + nx + blah blah blah] should give you your answer.
    THANKYOU ur the best!!!
    • 7 followers
    Offline

    ReputationRep:
    (Original post by TenOfThem)
    Perhaps it would have been better to start a new thread


    \frac{3}{2-3x} = 3(2-3x)^{-1}


    (2-3x)^{-1} = 2^{-1}(1-\frac{3x}{2})^{-1}= \frac{1}{2}(1-\frac{3x}{2})^{-1}


    therefore


    \frac{3}{2-3x} = \frac{3}{2}(1-\frac{3x}{2})^{-1}
    THANKYOUUUUU!!! you're the best as well!! (:
    • 51 followers
    Offline

    ReputationRep:
    (Original post by Junaid96)
    How do you do that maths notation stuff?
    Just trying it out below, it's probably going to be a mess though :P :

     \frac{\pi}{17}(1-sin^{2}\theta)

    Edit: haha it worked, but I don't know how to do anything else. Is there a guide anywhere?
    Look higher up the page for the "How to use LaTex"


    Do you see how easy it was for me to make your attempt even neater
    • 70 followers
    Offline

    ReputationRep:
    (Original post by Raj K)
    THANKYOU ur the best!!!
    http://weknowmemes.com/wp-content/up...top-it-you.png
    • 70 followers
    Offline

    ReputationRep:
    (Original post by TenOfThem)
    Look higher up the page for the "How to use LaTex"


    Do you see how easy it was for me to make your attempt even neater
    Indeed I do. Thanks
    • 7 followers
    Offline

    ReputationRep:
    looool ok i'll take it back
    • 70 followers
    Offline

    ReputationRep:
    (Original post by Raj K)
    looool ok i'll take it back
    Nooo thumbs up instead would be good I suppose XD
    • 3 followers
    Offline

    ReputationRep:
    (Original post by TenOfThem)
    Perhaps it would have been better to start a new thread


    \frac{3}{2-3x} = 3(2-3x)^{-1}


    (2-3x)^{-1} = 2^{-1}(1-\frac{3x}{2})^{-1}= \frac{1}{2}(1-\frac{3x}{2})^{-1}


    therefore


    \frac{3}{2-3x} = \frac{3}{2}(1-\frac{3x}{2})^{-1}
    How do you get the latex to go down the page nicely like that, mine always looks horrible. Secondly in an exam if a question would you recommend writing out all the steps as you did there or is it all right to skip steps?

Reply

Submit reply

Register

Thanks for posting! You just need to create an account in order to submit the post
  1. this can't be left blank
    that username has been taken, please choose another Forgotten your password?

    this is what you'll be called on TSR

  2. this can't be left blank
    this email is already registered. Forgotten your password?

    never shared and never spammed

  3. this can't be left blank

    6 characters or longer with both numbers and letters is safer

  4. this can't be left empty
    your full birthday is required
  1. By joining you agree to our Ts and Cs, privacy policy and site rules

  2. Slide the button to the right to create your account

    Slide to join now Processing…

Updated: April 11, 2012
New on TSR

Which unis are the poshest?

See what students perceive to be the classiest establishments in Britain

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