CCEA Maths C4 1st June 2011

I think for the volume you had to find to a depth of 15cm, so I think that 3 and -12 were the limits they wanted to use, I got a volume of 4950cm^3 to 3 significant figures...anyone else get this? I have no idea what they wanted for the criticism however...it has no bottom/flat surface to rest on? I wrote that you have no idea which side is the top
Not a question to me however I think the answer for 2i was 1+x(dy/dx)+y and for 2ii I got y-5=-3(x-2) Which is y=-3x+11 I am not sure if that is correct though...

For how many you lose, I have no idea, I am really not used to stuff like that popping up, 14 marks seems a bit stiff to knock you out of for a mistake, I would hazard down 4 to 7 in total perhaps, I would love a better estimate than that from an examiner, a friend or two of mine slipped up a little in that and I want them to do well...
For the domain of the function, it was the usual business-the range of f(x), I think it was x>3 however functions are very far from my strong suit.

I think for the volume you had to find to a depth of 15cm, so I think that 3 and -12 were the limits they wanted to use, I got a volume of 4950cm^3 to 3 significant figures...anyone else get this? I have no idea what they wanted for the criticism however...it has no bottom/flat surface to rest on? I wrote that you have no idea which side is the top
Not a question to me however I think the answer for 2i was 1+x(dy/dx)+y and for 2ii I got y-5=-3(x-2) Which is y=-3x+11 I am not sure if that is correct though...

For question 8 part (ii) if you didnt use part (i) to find the integrals and just integrated by parts would you lose all the marks? Because I'm getting worried that I've lost all 7 marks for that bit

I got those answers! For the criticism I said the bowl might not be constant thickness. For k in my differential equation I got 0.0405, (ln1.5)/10 ? Anyone else? Overall I thought the paper was alright, a lot better than some of the previous papers!

I'm the same with qu 6. Hopefully they mark nicely lol I used substitution integration for 8,ii) but don't ask me what rubbish I came up with lol

I got the same as you for the differential equation, so hopefully thats a good sign! How did you do 8 part (ii) when it told you to use part (i) to integrate them two things?

Yay, hopefully it is Em it wasn't very clear, I wasnt sure whether to use parts or use the result from part i). So I used log rules for part ii) and also did it by parts aswell and got the same answer which reassured me a bit.

I just integrated by parts, so if you had to use log rules then chances are I'll be getting 0 out of 7 for that question :/ I'm frustrated because I should have done an awful lot better, because it wasnt a terribly difficult paper

I'm sure you won't get 0. As I said, I didn't think the question was that clear. A lot of people I know just did it by parts as well, so I wouldn't worry too much. There's also probably a mark for '+ c' in both

Hmmm that makes me feel a bit less worried about it. I got 97 in C3 so I can afford to mess up slightly in this and still get an A* overall. But it could be touch and go whether I manage to get 83 in this, hopefully loads of people do bad and the grade boundaries are really low lol