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# Edexcel A2 C4 Mathematics June 2015 - Official Thread watch

1. (Original post by CalebS5)
Is a D in Maths 50%?
A D in maths is 50% UMS marks as with all subjects but grade boundaries change every year so a D isn't necessarily 50% raw marks
2. (Original post by Medicjug)
I Thought you can't use reverse chain rule because the differential is not a constant?

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Correct. You have to expand it.
3. (Original post by Willis_l96)
You should use the reverse chain rule, or take the bracket equal to u and use a u substitution; both methods you're going to be doing the exact same thing.

The standard formula for integration is awful, I've always remembered it in words.
Then you're left with a 4x+7
Do we divide by this?

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4. If in my maths exams I got (marks)
C1 - 60
C2 - 42
C3 18
C4 - 20
S1 - 50
D1 - 40

What grade would that get me in A-Level maths?
5. (Original post by Rubgangsci)
Correct. You have to expand it.
Yeah sorry, complete lack of concentration here! You most likely have to expand it I reckon
6. (Original post by CalebS5)
If in my maths exams I got (marks)
C1 - 60
C2 - 42
C3 18
C4 - 20
S1 - 50
D1 - 40

What grade would that get me in A-Level maths?
A U or an N grade.
You need to be more confident!

All the best. You've got this!
7. (Original post by abcd1230)
A U or an N grade.
You need to be more confident!

All the best. You've got this!
How could it be a U?
8. (Original post by CalebS5)
If in my maths exams I got (marks)
C1 - 60
C2 - 42
C3 18
C4 - 20
S1 - 50
D1 - 40

What grade would that get me in A-Level maths?
Average mark of about 39. So an E, but depending on boundaries you could certinally get a D. But with marks like that in C3/4 you can't be expecting much more.
9. 60 + 42 + 18 + 20 + 50 + 40 = 230
230/6 = 38.33333.......

Don't know how the grading is. Sorry.
I thought if it was below 40, it'd be a U.

Apparently it's an E (according to user above.)

Good luck tomorrow!
10. Dont get integration by parts man....
11. (Original post by abcd1230)
60 + 42 + 18 + 20 + 50 + 40 = 230
230/6 = 38.33333.......

Don't know how the grading is. Sorry.
I thought if it was below 40, it'd be a U.

Apparently it's an E (according to user above.)

Good luck tomorrow!
That's not how it works! :P

60 + 42 + 18 + 20 + 50 + 40=230 (My score)
75 x 6 =450 (highest possible score)

(230/450) x 100 = 51
12. (Original post by Rubgangsci)
Average mark of about 39. So an E, but depending on boundaries you could certinally get a D. But with marks like that in C3/4 you can't be expecting much more.
Thanks! I'm not expecting any more to be honest; I'd be freaking happy with a D! (no pun intended)
13. (Original post by CalebS5)
That's not how it works! :P

60 + 42 + 18 + 20 + 50 + 40=230 (My score)
75 x 6 =450 (highest possible score)

(230/450) x 100 = 51
UMS Marks and Raw marks are different. Any previous results will be displayed as your UMS on your results sheet. UMS is what determines your grade.
14. (Original post by abcd1230)
UMS Marks and Raw marks are different. Any previous results will be displayed as your UMS on your results sheet. UMS is what determines your grade.
So I would need about 55% raw marks (roughly) to even pass?!
15. (Original post by CalebS5)
If in my maths exams I got (marks)
C1 - 60
C2 - 42
C3 18
C4 - 20
S1 - 50
D1 - 40

What grade would that get me in A-Level maths?
completely depends on the grade boundaries!
let's make some estimations (worst case scenario estimations):
- 60 in C1 is around 75 ums (mid B)
- 42 in C2 is around 50 ums (D)
- 18 in C3 is around 15 ums (mid U)
- 20 in C4 is around 18 ums (mid U)
- 50 in S1 is around 64 ums (mid C)
- 40 in D1 is around 50 ums (D)
Total UMS: 75+50+15+18+64+50=272 UMS out of 480 UMS which is an E overall
But again it all depends on the grade boundaries and my estimations could be a long way out. However, i don't think it will be a U overall, i think your scores would be high enough for a solid E or maybe just about a D if grade boundaries were low?! Remember these were worst case scenario estimations. Good luck for tomorrow with C4 tho, hopefully it will better than what you expect.
16. (Original post by CalebS5)
So I would need about 55% raw marks (roughly) to even pass?!
Dude, focus on C4. I'll go through it tomorrow. It's not like you're only going to do a set amount of questions. Try your hardest. Get some sleep in you!
17. (Original post by kite0nfire)
Attachment 429419
Aaaaand here's the question... I need sleep
Hope the picture is clear enough

EDIT: Just realized there should be an integral sign before the 1 on the second line
Attached Images

18. good luck everyone! get some sleep!
19. (Original post by Abbz61112)
Dont get integration by parts man....
http://www.examsolutions.net/maths-r...tutorial-1.php

Spend about 15 minutes on this and it should make a lot more sense.
20. (Original post by marco cb)
http://www.examsolutions.net/maths-r...tutorial-1.php

Spend about 15 minutes on this and it should make a lot more sense.
Thanks ill watch it!

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