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# Edexcel C4 June 2016 - Unofficial Markscheme

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1. (Original post by Hineshtailor)
HOW MANY MARKS WILL I LOSE FOR THE TIME QUESTION WHERE I SAID X = 40 instead of 20??
You'll either get 1 or none dependent on whether the Mark Scheme allows for a correct method with incorrect values. I'd lean closer to none though, sorry.
2. Can anyone give me an estimate of how many marks I've got please?
I made a mistake and I think i got the coefficient of x^3 wrong, and I got 2c wrong (I got 4ln2 - 2) and for the life of me i couldn't work out what I did wrong even though I kept working at it. I also couldn't do part e of the last question but I got an answer of 2/5 for something??

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3. RIP A*. ****ed up everything. After full marks in C3 as well.
4. (Original post by BinaryJava)
Has anyone got question 7 anywhere, I did 512pi - integral from 17/2 to 1/2 of part a
the volume of the cylinder was 544pi i think
5. (Original post by robNikh)
hi does anybody know the marks for the final two parts of question 8?
the last part was 5. the one before that was 2 i think
6. Can anybody tell me for Q6b)
if I wrote 3ln(3y+2) - 2ln(3y) + C is correct?
coz i think it is equal to 3ln(3y+2) - 2ln 3 - 2lny + C
as -2ln3 is the constant, so can they be the same?
Moreover for Q8, finding the cos theta,
I have got cos theta = 0.8 , unfortunately I calculate through for theta = 36.9 degree , can I still get the full marks?
7. what is the score for3b、4b、7band6d？
(Original post by Mattematics)
Pretty sure every answer is now correct. Enjoy

Question 1:
Spoiler:
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Question 2:
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Question 3:
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Question 4:
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Question 5:
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Question 6:
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Question 7:
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Question 8:
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cos(theta) was 4/5. Left it out by mistake.
8. Well, I'm pretty sure I got 70/71 ... how many ums would this be ?
9. (Original post by Christoph987)
the area of the cylinder was 544pi i think
Volume
10. (Original post by fefssdf)
Well, I'm pretty sure I got 70/71 ... how many ums would this be ?
Probably between 90 and 95.
11. Lost 9-10 marks do I have atleast 85ums?
12. Are you sure about question 7c??? I got 32pi exactly
13. (Original post by pineneedles)
Can anyone give me an estimate of how many marks I've got please?
I made a mistake and I think i got the coefficient of x^3 wrong, and I got 2c wrong (I got 4ln2 - 2) and for the life of me i couldn't work out what I did wrong even though I kept working at it. I also couldn't do part e of the last question but I got an answer of 2/5 for something??

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4ln(2) -2
i got that at first..id changed a 1/3 to 1/2 between lines by accident but changed it in time..you probably did the same there
14. (Original post by Mattematics)
Probably between 90 and 95.

ahh hopefully this is enough leyway for me to flop s2 and still get an A then... lol
15. How much was Q7, part b worth??
16. (Original post by Waffles15)
yess
17. if I forget to put plus c do I lose a mark?
18. Did anyone else flop c3 but ace c4...
19. (Original post by yolandayan)
what is the score for3b、4b、7band6d？
3b) 4marks
4b) 3marks
7b) 2marks
20. (Original post by stephaniechan)
if I forget to put plus c do I lose a mark?
no I've seen on serval mark schemes where it says A1 ( with or without '+c' )

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