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2016 EDEXCEL CORE 1 MAY 18TH - Unofficial Markscheme 2016 watch

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    what was question 9b asking?
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    (Original post by SM45367)
    EDEXCEL C1:
    Q1) 2/5X^3-8X^1/2+3X+C
    Q2) y=6X+2
    Q3)a) 2root 2
    b) 3root 6
    Q4a) stretch in y-direction by scale factor 3.
    b) translate by vector (0,-4) (downwards)
    Q5) X=-1/7 ; Y= -1/3 X=-3/7 ; Y=1/3
    Q6)a) A2= 5-4K A3= 5-5K+4K^2
    B) 4K^2-9k+1
    C)I) I forgot to do again lol
    C)II) 500 (OMFG WAT WAS THIS?!)
    Q7)dy/dx= 6X+2X^-2/3+X^1/2+7/6(X^3/2)
    Q8)a) proof of inequality- had to substitute the 2 equations and the discriminant<0
    b) 1/2<P<9/2
    Q9)a) £225
    b) £180
    c) £1710
    d) 18 years from 10 years old so 27 years old
    Q10)a) 5Y+3X-44=0 b) R: (44/3,0) c) area of Quad: 76 units (this proved extremely difficult when splitting into 2 triangles, so I split in 2 triangles and a rectangle)
    Q11)a) dy/dx= 6X^2+2KX+5
    b) K=41/8=5.125
    c) y co-ordinate- 49/2
    D) 2y-17x-83=0

    give the correct answer if any of these are wrong and ill edit it
    For Question 10) c, I got 163/3 or something, but I'm not sure about that. I found where L2 crossed the y-axis, called that S, then found area of triangle PQS, which I subtracted from the bigger triangle OSR. Sorry, I can't explain very well without diagrams or anything. But 163/3 is a weird answer, so I'm probably wrong... :/
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    (Original post by TrueDAN)
    That was a tough paper no question. here are some of the answers I got, that my memory can recall. Feel free to share any you remember before the unofficial one is released I feel like I have done worse than expected

    Q1. Typical integration question - should be fine as long as you remember the +C
    Q2. 3^6x + 2 : I nearly messed up on that one yikes!!
    Q3. 5root2 - 3root2 leaving 2root2
    I then got 3root6 - you ended up with 24root6 over 8
    Q4.
    Q5. Not a fan of this one at all. 5-K and a quadratic - my memory is slacking!!
    The one marker was 500 - you got 5 each time - I guessed this one and got it wrong.
    The hell of a quadrilateral I got 326/6 which you could simplify to 163/3 units^2. I split it into a triangle and trapezium. The fact that R was 44/3,0 is just cruel.
    You got this from the equation 3x - 4y -44 = 0 or again something similar to that. Y = 0 at point R so 3x=44 therefore X = 44/3
    The value of K was also awful - I got 41/8 via equating the gradient function to the gradient of the line being 17/2. Again, nasty nasty numbers.
    Y= 1/2 when X = -2
    17x -2y + 35 = 0 is what I got for tangent equation.

    There was quite a challenging discriminate one. You had to make then 2 equations equal one another, and you get values of:
    A= 2P, B = -6p-3 and C = 3p-7 or something similar.
    When solving it, I got P > 1/2 and P< 9/2

    I got John to be 27 as (n-18)(n+25)
    Total money on his birthday something like £1050?

    The differentiation one was alright for the most part but I've probably messed up on it. The powers were harsh - can't remember it perfectly.

    Feel free to correct me if I'm wrong and share answers if you want. It's just a rough guide of stuff, hopefully the official one will be out soon to stop us all worrying!
    Bro, this has literally made my ****ing day. Apart from the area question with that ****ing quadrilateral, I got most of what you got. (SIGH OF RELIEF) I might just be able to put Oxford on the offers list. Thanks so much.
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    Does anyone remember the number of marks available for each question
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    What was question 9b and c asking. The sum when he's 18 and 21?? and how many marks was it again
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    (Original post by SM45367)
    EDEXCEL C1:
    Q1) 2/5X^3-8X^1/2+3X+C
    Q2) y=6X+2
    Q3)a) 2root 2
    b) 3root 6
    Q4a) stretch in y-direction by scale factor 3.
    b) translate by vector (0,-4) (downwards)
    Q5) X=-1/7 ; Y= -1/3 X=-3/7 ; Y=1/3
    Q6)a) A2= 5-4K A3= 5-5K+4K^2
    B) 4K^2-9k+1
    C)I) I forgot to do again lol
    C)II) 500 (OMFG WAT WAS THIS?!)
    Q7)dy/dx= 6X+2X^-2/3+X^1/2+7/6(X^3/2)
    Q8)a) proof of inequality- had to substitute the 2 equations and the discriminant<0
    b) 1/2<P<9/2
    Q9)a) £225
    b) £180
    c) £1710
    d) 18 years from 10 years old so 27 years old
    Q10)a) 5Y+3X-44=0 b) R: (44/3,0) c) area of Quad: 76 units (this proved extremely difficult when splitting into 2 triangles, so I split in 2 triangles and a rectangle)
    Q11)a) dy/dx= 6X^2+2KX+5
    b) K=41/8=5.125
    c) y co-ordinate- 49/2
    D) 2y-17x-83=0

    give the correct answer if any of these are wrong and ill edit it
    Can you remember the question for 10. I can't remember the equation of the line that L2 was parallel to.
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    (Original post by SM45367)
    EDEXCEL C1:
    Q1) 2/5X^3-8X^1/2+3X+C
    Q2) y=6X+2
    Q3)a) 2root 2
    b) 3root 6
    Q4a) stretch in y-direction by scale factor 3.
    b) translate by vector (0,-4) (downwards)
    Q5) X=-1/7 ; Y= -1/3 X=-3/7 ; Y=1/3
    Q6)a) A2= 5-4K A3= 5-5K+4K^2
    B) 4K^2-9k+1
    C)I) I forgot to do again lol
    C)II) 500 (OMFG WAT WAS THIS?!)
    Q7)dy/dx= 6X+2X^-2/3+X^1/2+7/6(X^3/2)
    Q8)a) proof of inequality- had to substitute the 2 equations and the discriminant<0
    b) 1/2<P<9/2
    Q9)a) £225
    b) £180
    c) £1710
    d) 18 years from 10 years old so 27 years old
    Q10)a) 5Y+3X-44=0 b) R: (44/3,0) c) area of Quad: 76 units (this proved extremely difficult when splitting into 2 triangles, so I split in 2 triangles and a rectangle)
    Q11)a) dy/dx= 6X^2+2KX+5
    b) K=41/8=5.125
    c) y co-ordinate- 49/2
    D) 2y-17x-83=0

    give the correct answer if any of these are wrong and ill edit it
    for question 10 everyone including me from my school got 163/3 which is 54.33333.
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    (Original post by Hasan98)
    Oops nevermind
    I think i got that too
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    (Original post by alphadelta)
    Dare we start guessing at UMS/grade boundaries??
    Since 2013, grade boundaries have been fluctuating between 63/64 for an A. The papers were relatively easy comparing to today's though I think so hopefully ours will be lower?
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    (Original post by bobmarly024)
    for question 10 everyone including me from my school got 163/3 which is 54.33333.
    For 6b i got 4k^2-9k+14
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    1. Simple Intergration remembering C
    2. 6y-3 ?
    3. 2 rout 2, 3 route6
    4. Graphs simple
    5. Something like 1/3 and 1/7 with minuses cant remember
    6. 500 and a proving a2 and a3
    7.Long differentiation all i remember is 7/3x^3/2
    8. 1/2< P <9/2
    9.225 age 27
    10. i got area as 35 unit ^2 by spltitting into a rectangle and two triangles but i assume thatd be wrong as people have got something over 3 before.
    11. 17x -2y + 35 = 0 41/8 and 17/2 grad

    Think area and maybe a part of last Q wrong how much was area worth if anyone can remember, hopefully i get maybe 68/69
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    (Original post by SM45367)
    EDEXCEL C1:
    Q1) 2/5X^3-8X^1/2+3X+C
    Q2) y=6X+2
    Q3)a) 2root 2
    b) 3root 6
    Q4a) stretch in y-direction by scale factor 3.
    b) translate by vector (0,-4) (downwards)
    Q5) X=-1/7 ; Y= -1/3 X=-3/7 ; Y=1/3
    Q6)a) A2= 5-4K A3= 5-5K+4K^2
    B) 4K^2-9k+1
    C)I) I forgot to do again lol
    C)II) 500 (OMFG WAT WAS THIS?!)
    Q7)dy/dx= 6X+2X^-2/3+X^1/2+7/6(X^3/2)
    Q8)a) proof of inequality- had to substitute the 2 equations and the discriminant<0
    b) 1/2<P<9/2
    Q9)a) £225
    b) £180
    c) £1710
    d) 18 years from 10 years old so 27 years old
    Q10)a) 5Y+3X-44=0 b) R: (44/3,0) c) area of Quad: 76 units (this proved extremely difficult when splitting into 2 triangles, so I split in 2 triangles and a rectangle)
    Q11)a) dy/dx= 6X^2+2KX+5
    b) K=41/8=5.125
    c) y co-ordinate- 49/2
    D) 2y-17x-83=0

    give the correct answer if any of these are wrong and ill edit it
    There are a few here which I'm not sure of.

    Q11(c): I think you've done something wrong, because I got 1/2.
    (d): By extension, I think that this is wrong too. I got 2y - 17x + 35.
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    This was a murder. I hope the grade boundaries will be lowered.... (so much harder than previous years)
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    1. Simple Intergration remembering C
    2. 6y-3 ?
    3. 2 rout 2, 3 route6
    4. Graphs simple
    5. Something like 1/3 and 1/7 with minuses cant remember
    6. 500 and a proving a2 and a3
    7.Long differentiation all i remember is 7/3x^3/2
    8. 1/2< P <9/2
    9.225 age 27
    10. i got area as 35 unit ^2 by spltitting into a rectangle and two triangles but i assume thatd be wrong as people have got something over 3 before.
    11. 17x -2y + 35 = 0 41/8 and 17/2 grad

    Think area and maybe a part of last Q wrong how much was area worth if anyone can remember, hopefully i get maybe 68/69
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    (Original post by chloe_white03)
    Since 2013, grade boundaries have been fluctuating between 63/64 for an A. The papers were relatively easy comparing to today's though I think so hopefully ours will be lower?
    I always thought that they did 80% for an A. Is that not true?
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    What were the answers to 6?

    Was it 5-4k for a1, as well as 5-5k+4k^2 for a3.

    Then was part b the one where you had to find the sum of the first three terms?

    I got 4k^2-9k+17

    Then the last one was 500?

    I have a feeling I'm missing something here.
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    (Original post by SM45367)
    EDEXCEL C1:
    Q1) 2/5X^3-8X^1/2+3X+C
    Q2) y=6X+2
    Q3)a) 2root 2
    b) 3root 6
    Q4a) stretch in y-direction by scale factor 3.
    b) translate by vector (0,-4) (downwards)
    Q5) X=-1/7 ; Y= -1/3 X=-3/7 ; Y=1/3
    Q6)a) A2= 5-4K A3= 5-5K+4K^2
    B) 4K^2-9k+1
    C)I) I forgot to do again lol
    C)II) 500 (OMFG WAT WAS THIS?!)
    Q7)dy/dx= 6X+2X^-2/3+X^1/2+7/6(X^3/2)
    Q8)a) proof of inequality- had to substitute the 2 equations and the discriminant<0
    b) 1/2<P<9/2
    Q9)a) £225
    b) £180
    c) £1710
    d) 18 years from 10 years old so 27 years old
    Q10)a) 5Y+3X-44=0 b) R: (44/3,0) c) area of Quad: 76 units (this proved extremely difficult when splitting into 2 triangles, so I split in 2 triangles and a rectangle)
    Q11)a) dy/dx= 6X^2+2KX+5
    b) K=41/8=5.125
    c) y co-ordinate- 49/2
    D) 2y-17x-83=0

    give the correct answer if any of these are wrong and ill edit it
    The area I think was as a decimal 54.3 and the last answer the was 2y -17x -(53 or 54 can't remember)
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    I think 8b was meant to be p>1/2, p<9/2, as they asked 'set of values' instead of 'set values'
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    (Original post by Puddles the Monkey)
    What exam board is this for?
    Wasn't K = 21/2 as u had to sub -2 into the dy/dx and equate it to 17/2
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    I actually thought this paper wasn't bad, it was the horrible fractions (44/3, 41/8 etc) that threw everyone off. Apart from that the questions were predictable enough for me. Spent a lot of time redoing those questions to make sure that they were really fractions though lol
 
 
 
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