You are Here: Home >< Maths

# EDEXCEL CORE 1 MAY 18TH - Unofficial Markscheme

Announcements Posted on
TSR's new app is coming! Sign up here to try it first >> 17-10-2016
1. 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
2. How many marks was 10c worth?
3. Here's a slightly better version.
4. (Original post by s0phi33)
How many marks was 10c worth?
5 i think
5. Does anyone remember roughly how many marks for each question? And who can roughly guess how many marks for a C this year?
6. (Original post by Turtlebunny)
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.
How did you get 4k^2-9k+17. I got 4k^2-9k+14

i literally did 4+5-4k+5-5k+4k^2
7. (Original post by Sharpify)
Here's a slightly better version.
Can you please explain how you got 6b
8. (Original post by jimbob52)
Just get out
9. (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
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
I got Q10 c) area = 163/3
Q11c) 1/2
d) 2y-17x-35=0
10. (Original post by TrueDAN)
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.
More or less everyone appears to have cocked up, so UMS will probably be generous... June 2009 was 70/75 for 100.
11. how many marks was 9c?
12. (Original post by agahaga)
how many marks was 9c?
3 marks
13. hey guys. Im ellieee and i didnt sirt the pOAP3ER TODAY but my friend did yAAAHHHH
14. Does anyone have the questions from the Edexcel c1 this morning? would like to go through it again to see where i went wrong
15. Yaaaaaaay ur wet
16. On Q5 i think you got X and Y mixed up, X=-1/3 Y=1/3, X=-1/7 Y=-3/7
17. (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!
I got 1/2 < p < 9/2 . Hope you're wrong there!

The surds one, was that supposed to be in terms of root(6)? ****!
18. (Original post by mottir17)
Does anyone have the questions from the Edexcel c1 this morning? would like to go through it again to see where i went wrong
Nope sozzy maybe try contact edexcel
19. (Original post by sakboi21)
5 i think
how many marks for 9c???/
20. (Original post by TrueDAN)
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!
I got the same as you for 11 C and D
However for 9C i got £1710

## Register

Thanks for posting! You just need to create an account in order to submit the post
1. this can't be left blank
2. this can't be left blank
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
1. Oops, you need to agree to our Ts&Cs to register

Updated: May 21, 2016
TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Today on TSR

### How does exam reform affect you?

From GCSE to A level, it's all changing

### Who would you like to thank?

Poll
Useful resources

Can you help? Study help unanswered threadsStudy Help rules and posting guidelinesLaTex guide for writing equations on TSR

## Groups associated with this forum:

View associated groups
Study resources

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

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