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# Edexcel A2 C3 Mathematics 12th June 2015 watch

1. (Original post by blueberry389)
3.1 and 14.1 instead of 13.9? is it alright?
Rounding error I'm guessing? I think you'll drop a mark

(Original post by Ocean3)
For Q 7c if wrote that you can't have an inverse of a cubic would i have got the mark?
I think you have to be more specific and explain that it's a many-to-one
2. Where is the mark scheme?
3. The beauty is here https://www.youtube.com/watch?v=1l_zIPFG8gw
Rounding error I'm guessing? I think you'll drop a mark

I think you have to be more specific and explain that it's a many-to-one
One to many *
5. (Original post by AbubakarB)
One to many *
Nope, many-to-one. Several x values match up to one y value. If it was one to many it wouldn't be a function.
6. What will the grade boundary for an A* be, I think i dropped around 8 marks
7. Hi for the reason why the graph can not be an inverse I put that there can not be an inverse as the graph cannot be a function since it is a one to many? Is this wrong?
8. [QUOTE=paradoxicalme;56927209]Rounding error I'm guessing? I think you'll drop a mark

what i did was used 13.1 and sub into the equation to find y instead of using 13.08...

is that rounding error?
9. (Original post by Ocean3)
What will the grade boundary for an A* be, I think i dropped around 8 marks
According to Arsey 67 should be enough for 90UMS but we can't be sure
10. i need to get an A in c4 to get an A overall
11. Can any guess what raw mark a B would be?
12. [QUOTE=blueberry389;56927285]
Rounding error I'm guessing? I think you'll drop a mark

what i did was used 13.1 and sub into the equation to find y instead of using 13.08...

is that rounding error?
I used 3.1 as well and still got 13.9 (because y=17-x).
13. 75/75

It took me a whole 20 minutes to figure out that I'd need to apply the difference of two squares for that trig question!

However, I felt that paper challenged me in very similar way to how June 2014 did, so I'd anticipate similar grade boundaries (probably 1/2 marks lower).

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14. (Original post by Mattyhouse)
Lol
15. (Original post by at55555555)
you really are a wasteman
theres too many paigons on here all day everyday real life is just too peak for them
16. (Original post by 96wst)
tanA=-1/3
KMTTTTTTT

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17. (Original post by kingaaran)
75/75

It took me a whole 20 minutes to figure out that I'd need to apply the difference of two squares for that trig question!

However, I felt that paper challenged me in very similar way to how June 2014 did, so I'd anticipate similar grade boundaries (probably 1/2 marks lower).

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Nice one mate. Me too.

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18. BRUV EDEXCEL CAN SUCK THEIR MOTHERS WITH FINESSE, WHAT EVEN WAS THAT EXAM, I WOULD LOVE TO TEST ALL THEIR CHINS, FKIN INBREDS

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Nope, many-to-one. Several x values match up to one y value. If it was one to many it wouldn't be a function.
nope one to many. one x value will give you many y values

oh and the question was asking why it wont be a function
20. Hey guys
So for 8(b) I screwed up and thought it was 2θ so my final answers are divided by two. How many marks would I lose?

Paper was definitely challenging but doable idk

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