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# Edexcel A2 C4 Mathematics June 2015 - Official Thread watch

1. (Original post by Mishy96)
http://m.imgur.com/a/OMb2o

Not Arsey but still good enough aha
Thank you you're a star 😀
2. (Original post by xKay)
i think question 2 part a is wrong
the '+8y (dy/dx)' is meant to be a negative, right?
3. (Original post by sansasstark)
I got that at first, but P=4 not P=4000! it told you P was in thousands
How many marks do uthink it would cost me

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4. (Original post by Raj_B961)
got 57 raw marks in c4, not sure what grade that is tho
Depends on the boundaries, at most a low A, otherwise a mid-leaning towards high-B, at a guess.
5. (Original post by xKay)
i think question 2 part a is wrong
Yes minor one.

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6. Hey guys

For Q7 c), do you think that I will still get at least 1 out of the 3 marks for trying to work out t by using P = 4000 even though I ended up with a maths error?

and for 8b), I integrated 3^2x as 3^2x divided by ln3 instead of 3^2x divided by 2ln3... Given that my subsequent working is correct, how many marks out of 6 would I get?

Thanks
7. Will 70/75 on C3 and 69/75 on C4 be an A*?
8. How hard did people find it?
Is there a vote on how hard people found it or something going on?
9. i used degree instead of radian to find the year thing how much marks would i lose?
10. (Original post by strugglingstdnt)
did no one think that in q2b there was actually 4 co-ordinates? because there are two coordinates for each x value that you find out. When you sub it back into the equation to find y, because its quadratic you get 2 different answers. therefore for x coordinate 24/5 there are two ys and for -24/5 there are also two ys

?????
yeah, i think the other one was the origin, (0,0)
11. 42/75 …. chances of an A just slipped away…bye bye Warwick
12. (Original post by alouxo)
the '+8y (dy/dx)' is meant to be a negative, right?
i got (2x - 3y)/(3x + 8y) I think
13. Arsey is online
14. (Original post by Raj_B961)
got 57 raw marks in c4, not sure what grade that is tho
Thats a B
15. (Original post by sunsri101)
Will 70/75 on C3 and 69/75 on C4 be an A*?
yep
16. Markscheme anyone?

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17. (Original post by oliviakellers)
yeah, i think the other one was the origin, (0,0)
no as in 4 coordinates other than the origin? - on that note i didnt knwo the origin was one
18. (Original post by strugglingstdnt)
no as in 4 coordinates other than the origin? - on that note i didnt knwo the origin was one
ohhh no sorry i think i was thinking of the wrong question!
19. How many marks will I get on 8B if I got the cone vol and did everything else right but I didn't square y?
20. Got k as 2 in Q6, would I get follow through? 😤

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