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# Edexcel Core 3 - 21st June 2016 AM watch

What do you lads think you got?
Missed out a solution for one of the trig questions (there were 4, I got 3) -1

Dodgily shaped arcsin graph but I got values right -1 (the negative region for y started to decline in gradient, when it's exponential-ish, but hey that one threw me off guard, since I don't think they've ever asked you to sketch an arc graph before)

For that equation of normal question I put 1/2 as gradient not -0.5, so got my c as 16.5, and not 17.5 (-1 or -2, but probably -2, since gradient would be A1 cao- any thoughts on that one?)

May or may not have lost a mark for the modulus graph where y was 0, as I put 0.5ln(6.25) for the value of x, when that could be simplified to ln(2.5). So possibly another -1

So I probably got 70-71, depending if they're cruel enough to deduct a mark for that last one. In a really unlikely scenario 72.
2. (Original post by Fas)
Actually, I don't think this is the case. I think you need 90 on both C3 and C4 for the A*, not an average.
You need to average 90 over C3 and C4, and score at least 480/600 overall.
3. (Original post by Princepieman)
OMGGG, look who it is!

How have you been man? Haven't spoken to you since the year 11/12 thread

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Lool it has been quite a while . So much has happened and changed in such a short space of time lol.. Generally i've been good hbu?

Back then you had like 80 posts now you're on the TSR Support team lol! Do you still see anyone else around from the thread?
4. (Original post by usycool1)
You need to average 90 over C3 and C4, and score at least 480/600 overall.
Fair enough. It's been a couple of years since I did A-Levels haha.
5. (Original post by Ecomaths)
Yeah but for were to do a petition we won't necessarily be attacking edexcel would we? We would only be putting our opinion forward
Sadly, it'd be a waste of time. I'd strongly suggest just trying to concentrate on C4 for now instead - I know how frustrating it is (I was in the batch that did the 'infamous' June 2013 paper or whenever it was) but if it was hard, grade boundaries will be lowered accordingly.

Good luck.
6. How many marks would I lose for mirroring the arcsin X graph in the y axis but put the coordinates in correctly and went through the origin?
7. (Original post by Fas)
Fair enough. It's been a couple of years since I did A-Levels haha.
No worries
8. How many marks will I lose for question two if I got +-rt5 but messed up the range and wrote -rt5<x<rt5 instead?

And for question 6b for messing up the differentiation part but got the methods right for finding the gradient and stuff?

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9. Quoting directly from the specification.
To be awarded an A* students will need toachieve an A on the full GCE Advanced level qualification and an A*aggregate of the A2 units.

Eg, if you did C1, C2,C3,C4,M1,S1 you need 80% from C1,2 and 80% from M1,S1 with an average of 90% in C3 and C4.

Hope this clears things up. (It applies to all Edexcel maths ie, Edexcel Maths, Further maths and the other two)
10. (Original post by ryanroks1)
Think I've got 71, hoping I've got the A*!
u look fresh out the whom what u doing a levels for
11. Does anyone have the paper? If not, can someone tell me, if you remember, whether they gave you the range for the "sketch arcsinx" question? As they gave the domain but I can't remember whether they gave the range
12. Is it just me that felt really confident going into the exam but feels like they've completely messed up?
13. (Original post by Elm Tree)
Lool it has been quite a while . So much has happened and changed in such a short space of time lol.. Generally i've been good hbu?

Back then you had like 80 posts now you're on the TSR Support team lol! Do you still see anyone else around from the thread?
Ikr?? Been bloody ages! Awesome to hear dude, what are you up to these days?

Yeah been pretty decent, had a rough scottish results day last year due to complications with coursework etc, so I'm sitting a levels in a year to 'resit'-ish.

AHAHA, yeah, I barely posted . I talk to a few of the folks who are at uni now like Rachel, Bude, L'Evil, The Financier etc

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14. (Original post by MarocMan)
Does anyone have the paper? If not, can someone tell me, if you remember, whether they gave you the range for the "sketch arcsinx" question? As they gave the domain but I can't remember whether they gave the range
They did -pi/2 < y < pi/2
15. (Original post by MarocMan)
Does anyone have the paper? If not, can someone tell me, if you remember, whether they gave you the range for the "sketch arcsinx" question? As they gave the domain but I can't remember whether they gave the range
-pi/2<=y<=pi/2

This isn't just for this question, the graph must always have that range and domain of -1<=x<=1 otherwise it wouldn't be an inverse function to the sin curve

Edit: 2000th post, where's my prize?
16. I completely messed up this exam. I think I'm gonna get 60 UMS. Is it still possible to get an A overall having 86 average from last year? Also, I'm doing D2 as part of AS further maths, it can count towards my maths if I get a high mark in it, right?
17. Hey guys. You know the five marker with three parts in the modulus graph . How many mark d o you think the question about the asymotote was ?
18. (Original post by dlc_01)
I completely messed up this exam. I think I'm gonna get 60 UMS. Is it still possible to get an A overall having 86 average from last year? Also, I'm doing D2 as part of AS further maths, it can count towards my maths if I get a high mark in it, right?
Yes, they can rearrange your modules to give you the highest possible mark.
19. For the 'show that' modulus question [g(x) = 2x + 43] (4 part (b), I think), were you just supposed to ignore the modulus sign? It said the root was 'positive' but that just means that x is positive - it didn't mean that 4e^2x - 25 was positive.

I did just ignore the modulus sign completely and ended up with the right thing, but I don't know that what I did was mathematically correct - was I supposed to prove that 4e^2x - 25 was positive for my value of x and therefore the modulus sign didn't affect it? It was only two marks but even if I got both of them, I'm not convinced the question was right... did anyone else think the same thing?
20. List of how many marks each question was worth anyone?

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