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# Edexcel C2 20th May 2015 *Official Thread* watch

1. (Original post by hollygc123)
omg i got £525 i think!!!
that's what im spendin on retakes do
2. Can someone list the amount of marks for each question

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3. (Original post by jshep000)
I'm sure you did great man dont worry about it I'ma gunna pop in the chem thread now, need to revise that to get ma A
yeah i'll head over there in a bit gunna chill til 1ish then get back on the grind
4. (Original post by frozo123)
Don't back me on it
but I believe it was x-2y=14=0
No no we got the same one so yeah
5. (Original post by BBeyond)
Btw I may be able to get the paper if you want it?
6. Same here

(Original post by Marsha85)
Same i need to c the questions
7. Is the unifficial mark scheme up yet???😝😛😀😃😄
Thank you
8. (Original post by target21859)
What do you think 71/75 would be in UMS?
only a prediction based on comments and polling
71 could be full UMS
9. What do you think 0/75 would get in UMS?
10. (Original post by Millie_mcl)
i can remebere equation i got but i found the gradient to be 3
i got 1/3
11. (Original post by Chocofudge123)
Can someone list the amount of marks for each question

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^^ yes pleas
12. (Original post by Rebeecccaahh)
Me me, ocr f211 and chemistry Friday?
Yeap F211 Tomorrow.
AQA unit 1 Chem Friday.
13. (Original post by xxxhabashibaxxx)
can someone show me how they did question 8 part b with the k in it.
i did this .

4sin^2x + cos x = 4-k
cos x = 4 -k - 4sin^2x
cos x = 4 -k -4(1-cos^2x)
cos x = -k +4cos^2 x

then i subbed 3 in as k , made a quadratic and solved
I solved it as a quadratic equation ,4cos quare- cosx-k=0
14. Anyone have f211 and f321 Thursday and Friday?

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15. Did anyone get £483 of the estimate for the total cost in the differentiation question?? My 'r' value was around 2.9something
16. (Original post by m_sweets)
I got something like -x + 2y + 14=0
i got x-2y-14=0 so yh ur right too
17. (Original post by joe1545)
C2 has no affect on whether you get an A* in maths or not
how come?
18. How long until arsey posts his attempt
19. (Original post by anndz3007)
I'm not sure, because i got r=(64/81)^1/2which give an exact number for r,maybe somewhere in your method
Since a/(1-r)=162 and a(1-r square)/(1-r)=34
162(1-r square)=34
1-r square =17/81
R square=64/81 ,r=8/9
Yes I think they were my numbers might have just slipped and put the last unit in wrong thanks
20. Can I retake c2 next year even if I don't continue with maths?

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