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Post your Maths Answers (higher)

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Comments

  • #52
    Cokehead Mother
    Closed Accounts Posts: 773 ✭✭✭Cokehead Mother


    I'm certain his solution is fine... 1:30am is a bad time for this. I'll show it to an alert american or something... I want a second person to tell me it's wrong.


  • #53
    Peleus
    Registered Users Posts: 784 ✭✭✭Peleus


    Cokehead Mother wrote: »
    Equations can have variables other than x!

    lol, i know, the way he wrote it I thought it was a quadratic in X not C.


  • #54
    SimpleLogic
    Registered Users Posts: 663 ✭✭✭SimpleLogic


    could someone post the answer for for 5C


  • #55
    stev2604
    Registered Users, Registered Users 2 Posts: 260 ✭✭stev2604


    Does anyone know when the marking schemes come out?


  • #56
    Peleus
    Registered Users Posts: 784 ✭✭✭Peleus


    stev2604 wrote: »
    Does anyone know when the marking schemes come out?

    I'm pretty sure they come out when the results are out. The marking schemes are definately not made until after the exams. theyre made over the summer and are probably available to the public after the results. maybe before, but not anytime soon.


  • #57
    Cokehead Mother
    Closed Accounts Posts: 773 ✭✭✭Cokehead Mother


    Burner- wrote: »
    could someone post the answer for for 5C

    Well if a, b and c are consecutive terms in a geometric sequence, then b/a = c/b.

    So you get this

    6xrmzo.jpg

    And then go on a cancelling spree and end up with n = -1, which obviously isn't a natural number.


  • #58
    Challenged
    Closed Accounts Posts: 40 ✭Challenged


    The Algebra solutions (Questions 1 & 2) have just been posted up:

    http://www.studentxpress.ie/papers/algsoln2008.pdf


  • #59
    Challenged
    Closed Accounts Posts: 40 ✭Challenged


    The solutions to Questions 4 & 5 have just been posted up:

    http://www.studentxpress.ie/papers/seqsoln2008.pdf


  • #60
    Cunning
    Closed Accounts Posts: 80 ✭✭Cunning


    Peleus wrote: »
    you got it right but [C^2 - C.X + 1 = 0] isn't a quadratic. you're missing an X squared.

    ermmm i think you'll find its a quadratic.
    not in x but in C?
    ppl often have difficulty with this for some reason


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  • #61
    MathsManiac
    Registered Users, Registered Users 2 Posts: 1,595 ✭✭✭MathsManiac


    Cokehead Mother wrote: »
    I'm certain his solution is fine... 1:30am is a bad time for this. I'll show it to an alert american or something... I want a second person to tell me it's wrong.

    Agreed, and a very nice solution it is too.

    Well done, Cunning! Thou art veritably eponymous!


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