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Ocr (mei) c2 exam paper 18/05 Watch

1. 123
2. This is great thanks, do you have the first two questions as well?
3. Forgot to add it , give me a sec guy

4. Awesome
5. some smart person do an unnficial markscheme please
6. I'll probably try and make one soon.
7. Also in question 7, what is the 6x to the power to? It's too fuzzy and I can't read it.
8. what was the answer to the log question?
9. y=100x^3
10. (Original post by Axion)
y=100x^3
I got y= x^3 + 100 Dunno where I went wrong!
11. (Original post by treeman1)
Also in question 7, what is the 6x to the power to? It's too fuzzy and I can't read it.
Think it was 6^1/2 If im not mistaken
12. (Original post by cabluigi)
I got y= x^3 + 100 Dunno where I went wrong!
I think you will only lose 1 mark.

you kept the + in there when you should of multiplied. Log(3) + log(2) = log(6)

essentialy the formula was in the form of y=kx^n which is the same as
logy=logk +nlogx
y = c + mx
logk=2
k=100
n=3

so if you simplify logy=logk +nlogx we get .... logy=log(kx^n) ..... get rid of the logs.... y=kx^n ...... therefore y=100x^3

Im not great at explaining maths sorry
13. i dont see how a straight line can be x^3? can some1 explain pls?
14. yeah i got y=10^3x+2 is that just completely wrong? haha
15. (Original post by Polioz)
I think you will only lose 1 mark.

you kept the + in there when you should of multiplied. Log(3) + log(2) = log(6)

essentialy the formula was in the form of y=kx^n which is the same as
logy=logk +nlog
( the form we were given )

Im not great at explaining maths sorry
Hopefully you're right, I wouldn't mind losing a mark there
16. (Original post by posting)
i dont see how a straight line can be x^3? can some1 explain pls?
it wasnt a straight line. the axes were logy and logx which form a straight line.

I lost 5 marks so dw :P
17. what did people write for question for, y=3fx and y=f4x?
18. (6,9) and (1.5,3) is what i got, not sure if that's right though
19. (Original post by Polioz)
Think it was 6^1/2 If im not mistaken
Yeah I'm pretty sure it's that. I just redid the question and I got the same answer as I did in the exam so it must be a half.
20. (Original post by maths.igcse)
(6,9) and (1.5,3) is what i got, not sure if that's right though
i got that too

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Updated: January 15, 2013
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