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# OCR (MEI) C2: Friday 15th Jan 2010 watch

1. has anyone got the questions?
2. (Original post by Ray_Han)
I thought it was pretty straightforward, touch wood. What did people get as the roots for the cubic graph? 0,0 and 1.5 +/- (11.25^0.5)? (Yes I don't know how to write mathematical notation).
yes those are what i got aswell.
3. 1/2x^2+3x^-1+c
5
165
root 2/ root 7
6.5
cant remember the graph ones
205
8 and a third
41
10.43
y=3/4x+12
just drew it with 3^0 labelled on axis
x=0.55
x= -1 or 3 , -1 max , 3 min
x= 0 and x= 3+-(45/2)^1/2
47.625
cant memba lower bound
47.664
something about over estimate for trapezium so intergration more accurate.
normal log stuf basicly ,gradient = 0.012 and intercep = 95.5
p=95.5(10^0.012t)
1738 million

these are roughly what i got and rememberd from exam , not sure if correct just my own awnsers , please leave feedback on what you got to what i got thanks
4. i got it to be 0,0 and (3+/- square root of 45)/2...
5. anyone know weree the exam paper can be founddd?
6. (Original post by kayn)
1/2x^2+3x^-1+c
5
165
root 2/ root 7
6.5
cant remember the graph ones
205
8 and a third
41
10.43
y=3/4x+12
just drew it with 3^0 labelled on axis
x=0.55
x= -1 or 3 , -1 max , 3 min
x= 0 and x= 3+-(45/2)^1/2
47.625
cant memba lower bound
47.664
something about over estimate for trapezium so intergration more accurate.
normal log stuf basicly ,gradient = 0.012 and intercep = 95.5
p=95.5(10^0.012t)
1738 million

these are roughly what i got and rememberd from exam , not sure if correct just my own awnsers , please leave feedback on what you got to what i got thanks

are you sure it was ^1/2. if it was i have deffinatly not got 90+
7. Seemed pretty easy :/

Here are the questions and their weightings. Just going to say the parts are like a b c cause i dont actually know what the parts are called:

1) 3
2)a) 1
b) 2
3) 3
4) 3
5) a) 2
b) 2
6) a) 3
b) 2
7) a) 2
b) 3
8) 5
9) a) 2
b) 3
10)a) 6
b) 3
c) 2
11)a) 4
b) 2
c) 4
d) 2
12)a) 3
b) 3
c) 4
d) 3

Sorry keeps taking away my formatting so looks a bit weird.
8. (Original post by Mr.Singh)
i got it to be 0,0 and (3+/- square root of 45)/2...
Squareee root 45!

how did you get that. do you remember the question??

I got square root something else dont remember know
9. (Original post by Mr.Singh)
i got it to be 0,0 and (3+/- square root of 45)/2...
That's also correct, but in a different form (calculator puts it into that form).
10. (Original post by Mr.Singh)
are you sure it was ^1/2. if it was i have deffinatly not got 90+
ye its just 3+ or - sqaure root of 45 divided by 2
11. (Original post by kayn)
ye its just 3+ or - sqaure root of 45 divided by 2
oh yeah hahah
well now for c3
TIME TO PWN SOME PAPER
god i need a life....
12. does anyone have the questions?
13. (Original post by kayn)
1/2x^2+3x^-1+c
5
165
root 2/ root 7
6.5
cant remember the graph ones
205
8 and a third
41
10.43
y=3/4x+12
just drew it with 3^0 labelled on axis
x=0.55
x= -1 or 3 , -1 max , 3 min
x= 0 and x= 3+-(45/2)^1/2
47.625
cant memba lower bound
47.664
something about over estimate for trapezium so intergration more accurate.
normal log stuf basicly ,gradient = 0.012 and intercep = 95.5
p=95.5(10^0.012t)
1738 million

these are roughly what i got and rememberd from exam , not sure if correct just my own awnsers , please leave feedback on what you got to what i got thanks
I think I also got these answers for the most part (although log graph answers are obviously different). I can't remember a couple of my answers though.
The 2 should not be in the bracket for 3+/-(45/2)^1/2. It should be 3+-(45)^0.5/2.
I think lower bound is around 43.
For the model estimate it over estimates so it is not completely accurate.
Also for the last one, the assumption that the rate of population increase will stay constant is unreasonable, e.g if there is a war.

What do people think grade boundaries will be around?
14. (Original post by Ray_Han)
I think I also got these answers for the most part (although log graph answers are obviously different). I can't remember a couple of my answers though.
The 2 should not be in the bracket for 3+/-(45/2)^1/2. It should be 3+-(45)^0.5/2.
I think lower bound is around 43.
For the model estimate it over estimates so it is not completely accurate.
Also for the last one, the assumption that the rate of population increase will stay constant is unreasonable, e.g if there is a war.

What do people think grade boundaries will be around?
i think 85+ for an A
i wanted to get 95+ but im doubting that iv easliy passed an A. i will cry if i havnt even got an A. i got 82 last year in it and wanted to do alot better but its probably inevitable i will resit either this or c1-84 again.. -.-
15. (Original post by Mr.Singh)
i think 85+ for an A
i wanted to get 95+ but im doubting that iv easliy passed an A. i will cry if i havnt even got an A. i got 82 last year in it and wanted to do alot better but its probably inevitable i will resit either this or c1-84 again.. -.-
Personally I think the boundary will be about 57/58 for an A, but we will have to wait and see. Don't worry about it, just wait and see how you have done. Even if you do resit again, it will seem easy compared to whatever modules you are doing first time round in summer.
16. (Original post by Keorl)
i thought it was a very similar paper to June 2009...
I disagree...I did the C2 today as a resit and I think today's was MUCH easier. The sequence and series questions weren't weirdly worded like last years. Once you've studied C3, C2 is ridiculously easy lol!
17. (Original post by Hippysnake)
I didn't do it today, but I did it this time last year.

Funzies!
Lol...that must have been lovely for you ! Was that a resit too?
18. (Original post by kellywellydoodle)
Lol...that must have been lovely for you ! Was that a resit too?
Nope. First time. (I done C1 in June 2008, so thought I may as well do C2 in Jan.)
19. i didnt find it too bad, nothing too scary, but i was a little unsure on the answer i got for the finding N bit on the arithmetic progression question, did ne 1 else get decimals for N and 2 values?
20. I took this as a retake and found it better than the June 2009 although got stuck on the periodic sequence question rite at the beginning, I just couldn't get it to work

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