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C1 MEI Wednesday 16th May 2012

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    Just created this thread for people who will be sitting the MEI C1 (4751) exam on Wednesday 16th May.

    I'm resitting after getting 78 UMS in the January exam; I'm quite optimistic this time round, but with the unpredictable nature of MEI who knows what monstrosities could find their way into the exam paper. :unimpressed:

    That being said, I have found that, on most papers, for a lot of the 'more difficult' questions (those towards the end of Section B) the key tends to lie with a quadratic equation.

    Anyway, aiming for 100 UMS on this paper! I hope it goes well for everyone else too!
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    Anymore ideas on what could come up?
    and just to ask, how did you get 78 first time round?
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    Don't focus on trying to question spot.

    UNDERSTAND the material, then do the past papers.
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    Hi can someone help me with question 7 http://www.mei.org.uk/files/papers/c107ju_6gfd3.pdf
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    (Original post by King of the Jungle)
    Hi can someone help me with question 7 http://www.mei.org.uk/files/papers/c107ju_6gfd3.pdf
    (4x+5)/2x = -3

    4x+5=-6x
    10x+5=0
    10x=-5
    x=-1/2
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    (Original post by tehforum)
    (4x+5)/2x = -3

    4x+5=-6x
    10x+5=0
    10x=-5
    x=-1/2
    sorry i mean 11i
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    I'm sitting this exam.
    Also got a B in Jan
    Hoping for around 90UMS or so.
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    (Original post by King of the Jungle)
    sorry i mean 11i
    grad = 7 - 3 /3 - 1 = 4/2 = 2
    perp grad = -1/2
    y - y1 = m (x - x1)
    y - 7 = -1/2 (x - 3)
    2y - 14 = -x + 3
    2y = x + 17
    x + 2y = 17

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    I'm doing this exam, not resitting

    Any tips for how to succeed? In some mocks I am getting 100% or very close, in others a few questions throw me. they always seem to be thing like circle equations, or factor theorum. Can someone explain factor theorus to me please? I've tried going over it, but I don't seem to get the concept, perhaps some dicussion may aide me.

    Are there any othe relevant polynomial theorums?
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    (Original post by AspiringGenius)
    I'd be happy to help with most things if you ask!
    I'd also be happy to help anyone
    Or try my best anyways!


    I hate the implication questions.
    In Jan I only got 1/4 marks in the ones that came up xD
    I also seemed to lose just one mark on a few questions so I am going to make sure I don't miss any steps that deserve marks in my calculations
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    (Original post by Alotties)
    I'd also be happy to help anyone
    Or try my best anyways!


    I hate the implication questions.
    In Jan I only got 1/4 marks in the ones that came up xD
    I also seemed to lose just one mark on a few questions so I am going to make sure I don't miss any steps that deserve marks in my calculations
    I don't mind the implication ones, it's the questions like: prove that n^2 + n is always even. I got it right, but i never know quite what they want to see--- do they want n(n+1) (which was right, plus a supporting statement), or implication symbols? or worked examples of different integers? non integers?
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    (Original post by halii_94)
    Doing this exam for the first time on Wednesday
    You will be fine!
    We all will on here unless we get a killer question (which won't happen :please:)

    (Original post by AspiringGenius)
    I don't mind the implication ones, it's the questions like: prove that n^2 + n is always even. I got it right, but i never know quite what they want to see--- do they want n(n+1) (which was right, plus a supporting statement), or implication symbols? or worked examples of different integers? non integers?
    I usually do some examples but it all depends on the question.
    Usually implication ones leave you like a box to write them in I think
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    (Original post by Alotties)
    You will be fine!
    We all will on here unless we get a killer question (which won't happen :please:)



    I usually do some examples but it all depends on the question.
    Usually implication ones leave you like a box to write them in I think
    Can you help me with factor or remainder theorum please? Its the only thing I haven't really learnt properly. I'm trying to teach myself now but we didn't go over it in class.

    My question is from June 2010 paper, using factor theorum,

    f(x)=x^3 + 6x^2 - x - 30. Using factor theorum find a root of f(x)=0 and factorise completely.

    Now I can factorise completely, and by observation I can tell that x=2 is a root of this polynomial. This means the fully factorised version becomes f(x)=(x-2)(x+3)(x+5), but as this is all by observation, I am prettty certain I'd lose all the marks.

    How wuld you go about this?
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    Ergh, C1, I remember you.

    Why you no let me use a calculator? :nopity:
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    (Original post by AspiringGenius)
    Can you help me with factor or remainder theorum please? Its the only thing I haven't really learnt properly. I'm trying to teach myself now but we didn't go over it in class.

    My question is from June 2010 paper, using factor theorum,

    f(x)=x^3 + 6x^2 - x - 30. Using factor theorum find a root of f(x)=0 and factorise completely.

    Now I can factorise completely, and by observation I can tell that x=2 is a root of this polynomial. This means the fully factorised version becomes f(x)=(x-2)(x+3)(x+5), but as this is all by observation, I am prettty certain I'd lose all the marks.

    How wuld you go about this?
    I would go about it by testing certain numbers!
    I usually start with 1 or 2.
    So...
    f(2) = (2)^3 + 6(2)^2 - (2) - 30
    = 8 + 24 - 32
    = 0
    Then I'd do polynomial division by x - 2 to find the other factors.
    (click to enlarge image)
    Click image for larger version. 

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    (x - 2)(x^2 + 8x + 15)
    (x - 2)(x + 3)(x + 5)

    That's how I'd do it
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    (Original post by Alotties)
    I would go about it by testing certain numbers!
    I usually start with 1 or 2.
    So...
    f(2) = (2)^3 + 6(2)^2 - (2) - 30
    = 8 + 24 - 32
    = 0
    Then I'd do polynomial division by x - 2 to find the other factors.
    (click to enlarge image)
    Click image for larger version. 

Name:	polyd.png 
Views:	138 
Size:	1.5 KB 
ID:	147997

    (x - 2)(x^2 + 8x + 15)
    (x - 2)(x + 3)(x + 5)

    That's how I'd do it
    but isn't there a more rigid methos as opposed to trial and error. isn't that essentially just observation method, but with a few guesses first?
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    (Original post by Benniboi1)
    Ergh, C1, I remember you.

    Why you no let me use a calculator? :nopity:
    This is how I felt in Jan!
    Lost 2 marks because my subtracting was rubbish
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    (Original post by Benniboi1)
    Ergh, C1, I remember you.

    Why you no let me use a calculator? :nopity:
    c1 with a calculator would just be fun! and maths isn't allowed to be fun! :L (or not AS anyway)
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    (Original post by AspiringGenius)
    but isn't there a more rigid methos as opposed to trial and error. isn't that essentially just observation method, but with a few guesses first?
    I was never taught another method and this is the one I have always used so I can't help you, I am not sure if there are any other methods
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    (Original post by AspiringGenius)
    c1 with a calculator would just be fun! and maths isn't allowed to be fun! :L (or not AS anyway)
    Very true if you do further maths then then you have FP2 to look forward to next year

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