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Edexcel A2 C4 Mathematics June 2015 - Official Thread watch

1. (Original post by Bustamove)
I found it was slightly harder than last years tbh... maybe it was the wording...last years was A*66 A 59 B 52 C 46 D 40 E 34I reckon the grade boundaries may be a little lower... maybeA* 64 A57, B50 C44 D 36 E32
I really hope you're right, i found it slightly harder than last years somehow too

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2. (Original post by Ripper Phoenix)
just because u saw ur answer in someones answers doesnt make it a mark scheme answer lol
When you share an answer between more than five people in your class, who do further math, in addition to your teacher who is working on the question, logic dictates that the answer is correct. Update me on the mark scheme answer though, in mid August.
3. (Original post by Mishy96)
I got 60 something for the angle
31 or something like that I think
4. (Original post by ASDuh97)
I put my calculator in degree mode for the population one and got 27 years i think, in radians it wouldv'e been too short of a time wouldn't it?
5. (Original post by ASDuh97)
I put my calculator in degree mode for the population one and got 27 years i think, in radians it wouldv'e been too short of a time wouldn't it?
calculus for trig is defined only for radians m9
6. vote and see my estimated boundaries at
http://www.thestudentroom.co.uk/show....php?t=3407637
7. Hey guys , for the last question ,it was 13pi/ln3 but I wrote 25pi/2ln3 which is wrong , I just messed up at the end, how many marks was the question and how much would I lose
8. and i know other people are saying +12 but it was -16 - -4 therefore -12
(Original post by HMusa)
Cheers it helps knowing someone else got the same answer
9. (Original post by ThePrestigeUK)
stop ch*tting **** you little imbecile
I reckon he does BTEC PE
10. (Original post by mbcns)
Could someone check this is right please?
for the last question,
y= 3^x, dy/dx = 3^xln3
when x =2 dy/dx = 9ln3
so tangent=
y-9=9ln3(x-2)
y= 9ln3x-18ln3+9
so it cuts the x axis where
9ln3x-18ln3+9=0
9ln3x= 9-18ln3
ln3x= 1-2ln3
3x= e^1-2ln3
3x= e/ln9
x = e/3ln9
You've worked out where it crosses the y axis...

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11. (Original post by raymr008)
flopped that paper so badly. Does anyone know the requirements for an a & for a b (i.e what ums do you need/average)?
480/600 a
420/600 b
12. (Original post by Freddy-Francis)
ye i did that aswell.

But i fkin forgot about the square root so it is +-
will it be 5/6 of the marks then for not getting the minus ones?
13. I needed around 50 UMS in this to get an A overall and I'll be lucky to get 10UMS lol yay I might as well have stayed in the garden at least then I'd have got one kind of tan
14. (Original post by Paraphilos)
Actually, that is mathematically correct.
Thank you, someone who manages to understand index manipulation and anti-derivatives. Rare occurrence within this thread.
15. (Original post by gGinaa)
I really hope you're right, i found it slightly harder than last years somehow too

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we have to wait for Arsey's answers... In Arsey.. we trust
16. Vector question.. Anyone get 60 something degrees.. Originally get 119.. Then minus that from 180?
17. Someone said they're already up but I can't find them

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18. Is there a ms yet? Sorry if its been posted previously.

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19. (Original post by anonwinner)
Anyone else miss Q9? Can't believe that..
20. if the last question i didnt change 3^2x to 9^x but the method was right, how many marks would i lose?

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