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# Edexcel C4 Monday 25th January 2010 (AM) watch

1. oh man I somehow messed up no.6 I used dA/dt = dA/dr x dr/dt amd got 6pi

how many marks would I loose 4 that ???
2. well ur equation is correct
the total mark for this q is 5
so most probably if the method is correct the max its minus 3 i guess
althu am not sure
3. (Original post by mohamed4iraq)
well ur equation is correct
the total mark for this q is 5
so most probably if the method is correct the max its minus 3 i guess
althu am not sure
2 for methods is reasonable
4. (Original post by hussam1992)
Yeah i think i got that also
wasn't the equation y-π/9=-2/3(x-π/6) ???
i think that gives T: 2x+3y-2π/3=0
did i get it wrong?
5. (Original post by hussam1992)
are you sure about your Q.2)c)ii) i think i got 1/4[(64ln2)-15] cuz its x squared.
That's what I got
6. (Original post by Jimlon0)
That's what I got
same
7. Diego_937 u have to multiply the equation so that all the #s r integers
8. (Original post by sulexk)
was it costheta=19/26?
I got that too.
9. (Original post by u4m1r)
yeh i guess. Besides, i only need 87 anyway to get an A*. (I got 93 in C3 last year)
Oh wow....what a weird coincedence

But i feel that the paper was a tad hard - i wouldn't say as hard as june 2009 but it was challenging, though....good paper for me, i feel
10. Does anyone know when abouts the results will be released? I have no idea cos i took the paper as an external candidate...
11. hi, could some one please post up the markscheme again cant open the one on page 8??
12. March 11
13. So I'm pretty sure I got somewhere in the region of 68-71... Could anyone guess whether or not this may be an A*? It would probably be borderline... I really badly messed up the last question but I worked it all the way through and will get error carried forward for part b).
14. do u think this paper was more demanding then other years or not.
15. this years paper was hard
although so was june 2009
i think its going to be about 58 for an A
16. (Original post by Arsey)
here are the solutions and paper
for Q3c the constant is 17/4, but i got pretty much the same answers at you except for q8 ofcourse. 100% plxxor!!
17. (Original post by thehomette)
So I'm pretty sure I got somewhere in the region of 68-71... Could anyone guess whether or not this may be an A*? It would probably be borderline... I really badly messed up the last question but I worked it all the way through and will get error carried forward for part b).
71 raw marks was the boundary for 100% for the last four years, my teacher told me, so hopefully things dont change and you get over 90%
18. (Original post by Rough Inclined Plane)
71 raw marks was the boundary for 100% for the last four years, my teacher told me, so hopefully things dont change and you get over 90%
Thanks, I very much hope this is the case! I'm pretty sure my mark will be closer to 68 or 69 but if 71 is still about 100 I'll still be in with a chance
19. (Original post by mohamed4iraq)
btw Arsey in ur solution the last q abt volume is wrong
bcz volume = pi * interal of y*2
not 2pi
of course, no idea why I did that. I didn't have time to check these answers.
20. (Original post by Rough Inclined Plane)
for Q3c the constant is 17/4, but i got pretty much the same answers at you except for q8 ofcourse. 100% plxxor!!
I don't know what you mean about 3c

seemed a pretty standard paper to me. I would guess 58-59 / 75

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