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2016 EDEXCEL CORE 1 MAY 18TH - Unofficial Markscheme 2016

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 :smile:

I feel like I have done worse than expected

HERE IS A LINK TO A NEAT VERSION OF THE MARKSCHEME:

https://drive.google.com/file/d/0B3Apf0QUOJbcX1lVcTA5aXdHSGs/view

Credit : Link sent from Sharpify

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. Graph transformations - scale factor 3 in y and move down by 4.
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! :smile:

UPDATE:
Got 92UMS - Unfortunately did mess up on the differentiation question

(edited 7 years ago)

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Reply 1

sheelo73

I messed it up pretty bad. I need to do well in the others to pull up my overall grade

Reply 2

TeeEm

http://www.thestudentroom.co.uk/showthread.php?t=4094723

Reply 3

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

(edited 7 years ago)

Reply 4

jimbob52

can some1 set me link to ocr thread :smile:

Reply 5

Puddles the Monkey

Original post by SM45367

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

What exam board is this for? :h:

Reply 6

Ordo

You need to mention which exam board.

Reply 7

SM45367

Original post by Puddles the Monkey

What exam board is this for? :h:

Edexcel

Reply 8

TeeEm

Please cast a vote
http://www.thestudentroom.co.uk/showthread.php?t=4094723

Reply 9

meowgoesthedog

The inequality question was f(p)<0 so it was 1/2<p<9/2

Posted from TSR Mobile

Reply 10

TrueDAN

Original post by sheelo73

I messed it up pretty bad. I need to do well in the others to pull up my overall grade

Don't stress it! It was horrendous for a paper - the grade boundaries are universally going to be lowered by quite a bit surely. Do not worry about a bad test, seems like almost everyone who sat the paper thinks the same!

Reply 11

sakboi21

Anyone know how many marks per question?

Reply 12

TrueDAN

Original post by meowgoesthedog

The inequality question was f(p)<0 so it was 1/2<p<9/2

Posted from TSR Mobile

I did put that but I prefer to do it separately just so I don't mess up on the signs.How you put it is the preferable way of arranging it, but I got the same values though, P is larger than one half but less than 9/2

Reply 13

TrueDAN

Original post by alphadelta

Dare we start guessing at UMS/grade boundaries??

Well I doubt a lot of people would have got full marks in the paper to say the least!! Can't tell though, but I reckon they will have to be significantly lower.

Reply 14

Hasan98

Original post by Hasan98

For 11c i got 44/3

Oops nevermind

Reply 15

maryamkhawaja

How low do you guys think the grade boundaries will be?

Reply 16

TomM699

Original post by maryamkhawaja

How low do you guys think the grade boundaries will be?

June 2009 had 55 marks for an A, and last year's summer paper had 63 for an A, where last years summer paper was considered much harder than june 2009.
I'm guessing 59-61 for an A, edexcel are scummy and probably won't care about the outrage which is happening, not that anything will* be done about it.

*June 2009 being the lowest boundary for an A grade

Reply 17

.JustAguy.

Original post by Hasan98

Oops nevermind

That's what I got

Reply 18

TrueDAN

Original post by SM45367

Damn you have a good memory. That's sick!
For 9C i got £1050 but I may have messed up on it.
For 11 C and D I got the Y to equal 1/2 and D I got 17x-2y + 35 =0 so again I may have messed up.
For 10c : I am pretty sure that it is 162/3 units^2 and not 76 via splitting it into a trapezium and triangle.
I agree with the simultaneous equations - I definitely got answers like that.
Thanks for remembering Q11 A I agree with that and they for the rest I got the same! :smile:

Reply 19

maryamkhawaja