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# OCR (Not MEI) C2 May 2013 (17.5.13) UO Markscheme Watch

1. What was question 7i? Show that...what?
2. Out of interest, am I the only one who put 19/10 as the area on q7ii)? Everyone seems to have got 37/30 and I'm one of only two people I know who got 19/10, but I can't see what I did wrong
3. (Original post by chuckynoriss)
7ii) how is it 37/30 because you do the integration of curve- tangent from 1 to 4 and 3/2( 1.5) is bigger than 1 so lower limit is 1
The line y=3x-5 crosses the x axis at i think it was (5/3) not one, so it you have to intergrate between 4 and 5/3 instead, which gives the area under the line as 8.1666 Hope that helps
4. What was question 3ii. ??
5. Thanks do you reckon I'll lose one accuracy mark if I integrated between 4 and 1?
6. probalby - and maybe one for the answer also- but you should hopefully get all the method marks
7. (Original post by Hannburger)
Hi, what was question 5?? (:
8. (Original post by Paribas01)
What was question 3ii. ??
9. Yeah, I suppose so thanks again!
10. (Original post by Rrobba)
What was question 7i? Show that...what?
Show that 1.3^n > 1.52... Something along those lines can't remember exact no's
11. (Original post by sugartown)
Can someone explain why the first one was 6.3 and not 9.56 or something? I got 6.3 before I x the bracket and then 6.3 x 3/2? So confused and feel a bit stupid considering it was such easy marks
I got 9.56 first time, but think I made a mistake so it's 6.39. The start of trapezium rule is 1/2 x h (h=width, in question given as 2) so it's 2/2 (=1) x6.39
12. Show that 1.3^N_< 91 I think, can't remember which way around the inequality sign was
13. (Original post by tgtips372)
Hey the reason you don't multiply the 6.3 by 3/2 is because the trapezium starts with h/2, there were 3 strips but the width of each strip was 2, so the h/2 was equal to 2/2 so basically it stays as 6.3. Hope that helps!
Ohhhh so I put 3/2 rather than 2/2 which is obviously 1! Argh so annoying! Think I probably would have got a B anyway as the paper did not go my way so didn't make too much of a difference!
14. I think I got >63 , does anyone know the highest grade boundaries for c2 there have been in previous years?

15. I got 9.56 first time, but think I made a mistake so it's 6.39. The start of trapezium rule is 1/2 x h (h=width, in question given as 2) so it's 2/2 (=1) x6.39
Argh wish I had looked back at it and realised! Thanks for the help
16. Since there's not one in the OP:
Worked Solution to 8ii)
17. (Original post by joostan)
Since there's not one in the OP:
Worked Solution to 8ii)
same method i used
18. Dont mean to be disrespectful to anyone's previous posts but I think a lot of people are mistaken on the grade boundaries for this paper. I am myself quite an able mathematician, scoring 96UMS on Core 1, and i did struggle with some aspects of the paper, especially 8ii. bearing in mind that most of the people who post on here are ALSO very able, i think we're forgetting that this was actually quite a difficult paper and will undoubtedly catch out the 'less able' candidates that took it, so my money is on 55-57 for an A grade
19. (Original post by chubuking)
same method i used
Lol - quite a nice q. The C2 I took in jan didn't have a nice logs question
20. Thanks

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