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# C3 ocr mei june 21st 2012 Tweet

Maths exam discussion - share revision tips in preparation for GCSE, A Level and other maths exams and discuss how they went afterwards.

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1. C3 ocr mei june 21st 2012
Hello everyone i couldn't find a C3 MEI June 2012 exam thread so I decided to make one. I just thought we could discuss any queries and that for some of us after C4 this exam is a lifeline LOL
2. Re: C3 ocr mei june 21st 2012
yeah resitting it! got 77 in c1, 77 in c2,70 in c3, 70 in s1 and probably failed D1 and core 4 lol so kinda hoping to bump this up to get a B overall! you got any ideas on what will come up?.
3. Re: C3 ocr mei june 21st 2012
woop, I'm in on this. Realllllllllllly prepared for it, considering I got the C4 and C3 dates mixed up and revised for C3 as if was on the 14th. Safe to say... C4 didn't go well

This is a lot easier than I remembered it being at the beginning of the year. Nothing can be as bad as Jan 2012 though!
4. Re: C3 ocr mei june 21st 2012
hello! i was wondering if anyone can help...
on the jan 11 paper, question 5 part ii
you have to find the exact coordinates of the point where y=e^-x and y=e^x-1 meet
so presumably you make them equal each other ... i.e. e^x-1 = e^-x
then on the mark scheme it says
e^2x-e^x=2
Im being really stupid but can't see how you get to that stage!
5. Re: C3 ocr mei june 21st 2012
e^-x is the same as 1/e^x so
e^x -1= 2*1/e^x
e^x -1=2/e^x
Multiply both sides by e^x to get
e^2x -e^x=2

(since e^x * e^x is e^2x as the powers are added together )
6. Re: C3 ocr mei june 21st 2012
e^-x is the same as 1/e^x so
e^x -1= 2*1/e^x
e^x -1=2/e^x
Multiply both sides by e^x to get
e^2x -e^x=2

(since e^x * e^x is e^2x as the powers are added together )
hey sorry i don't understand why you times it by 2 on the second line! sorry I'm having a complete mind blank!!
7. Re: C3 ocr mei june 21st 2012
(Original post by rosie12)
hello! i was wondering if anyone can help...
you have to find the exact coordinates of the point where y=e^-x and y=e^x-1 meet
Oh, that might be your problem there. One curve is the y=e^x-1 like you had, but the other is y=2e^-x
8. Re: C3 ocr mei june 21st 2012
woop, I'm in on this. Realllllllllllly prepared for it, considering I got the C4 and C3 dates mixed up and revised for C3 as if was on the 14th. Safe to say... C4 didn't go well

This is a lot easier than I remembered it being at the beginning of the year. Nothing can be as bad as Jan 2012 though!
Jan 2012... I hear you bro. :P
9. Re: C3 ocr mei june 21st 2012
Has anyone got the c3 paper from Jan. 2012? If so can you post it on here please
10. Re: C3 ocr mei june 21st 2012
(Original post by Alasda1r)
Has anyone got the c3 paper from Jan. 2012? If so can you post it on here please
Apologies for the notes on question 8.

http://i.imgur.com/r09BY.jpg
http://i.imgur.com/1NUG1.jpg
http://i.imgur.com/dCGyo.jpg
http://i.imgur.com/H78Bv.jpg
11. Re: C3 ocr mei june 21st 2012
You hero! Spent ages searching for that exam a few weeks back.
12. Re: C3 ocr mei june 21st 2012
13. Re: C3 ocr mei june 21st 2012
You hero! Spent ages searching for that exam a few weeks back.
I did it for real and hated it. Good thing I'm resitting it after Core 4 went equally badly. I found it bad on timing but I normally work pretty slow anyway so it could just be me.
14. Re: C3 ocr mei june 21st 2012
Could someone please tell me why in January 2010, question 9.iv) the domain is given as -1< x < 1.4 instead of -1≤ x ≤ 1.4?

Many many thanks!
15. Re: C3 ocr mei june 21st 2012
Anyone happen to have a mark scheme for jan 2012 c3?
16. Re: C3 ocr mei june 21st 2012
(Original post by Alasda1r)
Anyone happen to have a mark scheme for jan 2012 c3?
It's in here somewhere
Attached Files
17. C3 - Jan 12.pdf (546.4 KB, 380 views)
18. Re: C3 ocr mei june 21st 2012
19. Re: C3 ocr mei june 21st 2012
20. Re: C3 ocr mei june 21st 2012
(Original post by jackharris)
yeah resitting it! got 77 in c1, 77 in c2,70 in c3, 70 in s1 and probably failed D1 and core 4 lol so kinda hoping to bump this up to get a B overall! you got any ideas on what will come up?.
Sorry I have no idea the logs graph questuin hasn't come up for a while so you never know
21. Re: C3 ocr mei june 21st 2012
woop, I'm in on this. Realllllllllllly prepared for it, considering I got the C4 and C3 dates mixed up and revised for C3 as if was on the 14th. Safe to say... C4 didn't go well

This is a lot easier than I remembered it being at the beginning of the year. Nothing can be as bad as Jan 2012 though!
Ooooh unlucky hopefully the grade boundaries will be low, Yh messed up in Jan hoping to get 75ums to secure my B grade
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