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# OCR (non mei) C4 Friday 24th June 2016

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1. Was all fine then question 9 (which had so many marks) screwed me over.

Needed 90+ in this to get the A, given the disaster that was C3. Think i scraped the A in this paper.

Anyone have any idea of C4 boundary, i think it was deffo harder than any past paper (although you could say the same about every year), but the trig im sure catched a lot of people out, in both papers.
2. (Original post by Sid1234)
stationary points are ((3+-3)/root3, (+- 4root3)/9)
I think there should only be two stationary points because four should be out of range
3. Similar difficulty to last years paper, so alright paper overall
4. What did you guys get for n and k on the binomial?
5. (Original post by banksy0312)
What did you guys get for n and k on the binomial?
4 and -3/2

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6. N=-6 and K=sqroot70/7
7. (Original post by banksy0312)
What did you guys get for n and k on the binomial?
N=-3/2 k=4
8. (Original post by banksy0312)
What did you guys get for n and k on the binomial?
K=4, n= a negative fraction (forgot the exact value)
9. n and k were 4 and -3/2? area of the vector triangle was 4.22? i remember an integral being (3/8)pi + 3/8?
10. (Original post by banksy0312)
What did you guys get for n and k on the binomial?
n=-3/2
k=4
11. (Original post by duncant)
n and k were 4 and -3/2? area of the vector triangle was 4.22? i remember an integral being (3/8)pi + 3/8?
Yes

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12. Did you get 18 ln something - 27/4 on one of the integrals?
13. (Original post by blinin7)
Was all fine then question 9 (which had so many marks) screwed me over.

Needed 90+ in this to get the A, given the disaster that was C3. Think i scraped the A in this paper.

Anyone have any idea of C4 boundary, i think it was deffo harder than any past paper (although you could say the same about every year), but the trig im sure catched a lot of people out, in both papers.
People say this was the hardest paper ever every year.
To be frank this paper was not the hardest out of all papers that exist out there
I would say 54-57 for an A)

Would be nice if someone created a mark scheme)
14. (Original post by banksy0312)
Did you get 18 ln something - 27/4 on one of the integrals?
Yes

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15. (Original post by duncant)
n and k were 4 and -3/2? area of the vector triangle was 4.22? i remember an integral being (3/8)pi + 3/8?
Is that for the integration by parts question? I got pie/2 +3/8
16. (Original post by banksy0312)
Did you get 18 ln something - 27/4 on one of the integrals?
Yh i did
17. (Original post by drandy76)
Decent paper imo, no DE which I think people usually mess up some might be highish grade boundaries

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There was a disguised one(The final question)
18. (Original post by daniellon)
Is that for the integration by parts question? I got pie/2 +3/8
just checked on my calculator its 3pi/8 +3/8
19. (Original post by AlfieH)
N=-6 and K=sqroot70/7
n=-3/2 k=4
20. (Original post by tmoss99)
I got e^ln(e^2/144) but they're equivalents right?
Yep but I don't think it is in the right form??

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