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OCR (not MEI) C1 13/05/13 Watch

1. (Original post by StephHowarth)
Yeah but if we are wrong, I am hoping we get some method marks, because I did some differentiating and subbing in
yep, now you mention it i did the same things! hopefully method marks will be the difference between a grade! :P
2. Yeah, same, Some sort of subbing in, and then I put the co-ordinates back into the original curve equation at the end and it equalled 0, so I though it was right
3. For the last question, I got (-2,-27) but I used a different method, I used the factor theorem instead of differentiation, will this affect my mark because it's not part of the c1 syllabus?

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4. (Original post by metabalo)
I liked this paper. It wasn't too bad. For the last question I got (-2,-27) however I got a gut feeling I wrote the solution in the wrong space. Did the last question where it asked for the tangent run from the last page inside the booklet onto the back? Because I didn't run onto the back for that question and I got a terrible feeling I wrote it in the wrong place
You do not have to write the answer in any specific part of the answer booklet, only next to the correct question number. Congrats for getting (-2,-27) as that is right.
5. (Original post by styles4777)
What did you all get for the minimum value? for 3(x+1.5)^2+3.25 ???
That is correct.
6. (Original post by eggfriedrice)
Yup that's what I though.

Apart from leaving two answers at the end, I think I got the rest right unless I made a silly mistake somewhere.

Hows your mechanical engineering scholarship application going?
I finished the exam in 40min and spent the rest of the time checking thoroughly and going over question by question. I sent my scholarship off ages ago like in march but my reference is being sorted out by my school and sent to IMechE all I need to do is focus and get the grades and hope they liked my engineering enthusiasm lol. How's yours going?
7. (Original post by Anubis2)
Might want to check your answer as it was -2,-27. First surd being 12(5^0.5).
i meant -2, and yeah, i did get the first surd lol
8. (Original post by StephHowarth)
Yeah, same, Some sort of subbing in, and then I put the co-ordinates back into the original curve equation at the end and it equalled 0, so I though it was right
yeah, i assumed it was right because all the factorising and subbing in seemed to be rolling out :/ fingers crossed anyway
9. (Original post by styles4777)
sadly no :'( it said with a b and c as integers :/ )
(Original post by thebigman1)
it is but the question asked for them all as integers so think you had to times through by 2 :/
Unfortunately not (though I may have been silly enough to do that too!) They say "integers" in the question. 1/2 is not an integer. Maximum loss is 1 I'm sure.
Oh FFS

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10. (Original post by emmalouisereid)
For the last question, I got (-2,-27) but I used a different method, I used the factor theorem instead of differentiation, will this affect my mark because it's not part of the c1 syllabus?

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probably, but you'll still get the answer mark but lose some method marks I think..
11. (Original post by StephHowarth)
Yeah but if we are wrong, I am hoping we get some method marks, because I did some differentiating and subbing in
I don't see how we were wrong though do you remember doing it like this
x^3+3x^2=4
x^2(x+3)=4
x=1 ?
12. (Original post by daisyrchds)
yeah, i assumed it was right because all the factorising and subbing in seemed to be rolling out :/ fingers crossed anyway
Yeah, wasn't it supposed to be a tangent at those co-ordinates aswell? So when I subbed in and got 0, it just look right
13. (Original post by a10)
I finished the exam in 40min and spent the rest of the time checking thoroughly and going over question by question. I sent my scholarship off ages ago like in march but my reference is being sorted out by my school and sent to IMechE all I need to do is focus and get the grades and hope they liked my engineering enthusiasm lol. How's yours going?
Same, I was tempted to ask for scrap paper to do the test again and see if I get the same answers, but instead I just decided to check through 3 times. Luckily I spotted and corrected a few mistakes.
Oh wow, their application thing opened early then. I haven't even touched my application in a few weeks lol, I literally have half a box to fill and send off.
14. From what I can remember so far:

I will edit this post until Mr M posts the unofficial solutions. Hope everyone did as well as they hoped. Best of luck for the future exams!
15. (Original post by StephHowarth)
Yeah, wasn't it supposed to be a tangent at those co-ordinates aswell? So when I subbed in and got 0, it just look right
yeah, now that i think about it i think i differentiated the equation then equated the differential to 9 because they would have the same gradient?
16. (Original post by John Dogg)
I don't see how we were wrong though do you remember doing it like this
x^3+3x^2=4
x^2(x+3)=4
x=1 ?
For the life of me I can't remember, but I definitely made them equal to each other and did something from there I think we will definitely get method marks, we may even be right, but I never think I have done it right haha
17. I can see 59/72, what do you guys think the grade will be?

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18. (Original post by Dugald)
1i 12route5
1iii 5route5
(-3/2,17/4) was the minimum point
'Fraid you're wrong, the last is (-3/2, 13/4).
19. I can see 59/72, what do you think grade boundaries will be?

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20. (Original post by daisyrchds)
yeah, now that i think about it i think i differentiated the equation then equated the differential to 9 because they would have the same gradient?
Yeah I definitely used the fact that they had the same gradient

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