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# OCR MEI Core 4 (C4 4754/01 and 4754/02) watch

1. (Original post by Steff21)
hmm, well after reading this, i havnt done 2 bad. i got A=1 and B=-1 on the partial fractions qu, i put B on the last qu on the comprehension, and 100 and the speed with the least emissions. also got 0 and 62ish for 1 of the qu's, cant remember which. urm... on the graph on qu 3, did any1 get it crossing the axis at 1,-1 and 1/2,-1/2 (cant remember which was y and which was x)? thanks
Yeah, I got cut the x axis at cut y axis at
2. (Original post by work now, enjoy later)
for the volume of revolution, what did people get?
i got 4/3pi
oh craaap
forgot the pi
oh well
3. Yay thats a few more marks then, thanks
4. (Original post by Tallon)
Think I did quite well. Hoping for the A*. I don't want to sound too big headed but if anybody has any questions about the exam quote me and ask and I'll try and remember.
What did you put for the last question on the comprehension?
5. (Original post by matt2k8)
There's a link to the "curriculum 2000" papers on the MEI site somewhere (on the page of the current papers I think) - you'd be wanting to look at P2 and P3
P2 is a bit Core 2, with things like sequences in :/ is there much C3 in? Don't know if it's worth doing.

(Original post by DeanT)
For the comprehension graph, were you supposed to just draw 5 horizontal lines for the correct boundaries, or a curve/line?

I got 10cm for Q5 in the comprehension, I think I messed up 2 parts of the vector question so unless the markers are kind there goes my A* .
I assumed we had to draw that 'step function' graph thing.

Tbh I thought a bar chart would've been more appropriate
6. (Original post by DeanT)
-_- how did you get this
7. (Original post by JoshC)
-_- how did you get this
and then just use the general expansion.
8. (Original post by JoshC)
-_- how did you get this
By binomial

which by the binomial is approx

Hope this helps
9. (Original post by DeanT)
and then just use the general expansion.
-_- i obviously never came across one of these questions before.. (taking the 4 out that is)

looks like ive lost a few there then, i just did:

1 + x/2 + (1/2*-1/2)/2! x^2 :l
10. Oh My God -.- I thought the vertical was the x-axis, even though it said z was "vertically" upwards - I thought they were trying to catch you out, they should REALLY clear that up, I used (1, 0, 0) as my direction vector instead of the (0, 0, 1). Ffs I could have got the marks for that =.=. Oh well hopefully ecf.

The Comprehension was so easy but while reading it, I was like..."Oh my god...WHO GIVES A **** ABOUT THIS?" I felt like George Bush#.

I put C for the last question....but I don't think I justified it correctly. I basically stated that since they used 7 significant figures, when calculating, you knock off one significant figure, hence you use 6 significant figures, therefore it was to the nearest metre.

Lol .

C4 was fine apart from that vertical thing, I might have also got some of the angles wrong, I got 89.5 Degrees for one & 48.5 Degrees for another one. Apart from that & the first parametric equations x^2 + 4y^2 = 1 or something similiar, everything went smoothly.
11. (Original post by foolsihboy)
By binomial

which by the binomial is approx

Hope this helps
Ugh just realised I made an arithmetic error on the 3rd term and put /128 lol. Ah well, only 1 mark, should still get an A*
12. (Original post by matt2k8)
Ugh just realised I made an arithmetic error on the 3rd term and put /128 lol. Ah well, only 1 mark, should still get an A*
Immediately after my paper had been collected my brain went
"IDIOT! TAKE THE ANGLE OFF 90 TO GET THE INTERSECTION WITH PLANE"

and likewise for the comp I put "to the nearest millimetre" which again is quite clearly wrong. Urgh. If only I'd checked thoroughly.

By the way, did you find that, after STEP/AEA preperations, C4 seemed sooo much simpler than it used to?
13. (Original post by treemantris)
What did you put for the last question on the comprehension?

B.
14. (Original post by Steff21)
hmm, well after reading this, i havnt done 2 bad. i got A=1 and B=-1 on the partial fractions qu, i put B on the last qu on the comprehension, and 100 and the speed with the least emissions. also got 0 and 62ish for 1 of the qu's, cant remember which. urm... on the graph on qu 3, did any1 get it crossing the axis at 1,-1 and 1/2,-1/2 (cant remember which was y and which was x)? thanks
Yeah I got some ovally shaped graph crossing at 1, -1, -1/2, 1/2

Instead of getting 2tanT(tanT+2) i seemed to get 2tanT(tanT+1) so I got T= 0 and 45 which is obviously wrong

I put B on the last question but I forgot to write down 110 or whatever the y coord was for Q2 on the comp and only wrote 100.
15. I don't see why anybody would even need to talk about the partial fractions questions. You can just chuck in x =7.34343 or whatever and see minus your answer from the starting fraction in the book and it should equal 0? But yeah, I got A =1 and B =-1, assuming we're using the same denominators for A and B.
16. DAMNIT - for the third term of the binomial expansion I think I wrote /32 instead of /64.
17. I seem to have got the same answers for paper A and am confident on that.

However, comprehension the last two questions I'm not too sure.

For the last one I put C because with 16264440cm it could be 16264449cm or something with a more accurate value of the distance so would be 16264450 to the nearest ten centimetre, but I think that's wrong.
18. (Original post by foolsihboy)
Immediately after my paper had been collected my brain went
"IDIOT! TAKE THE ANGLE OFF 90 TO GET THE INTERSECTION WITH PLANE"

and likewise for the comp I put "to the nearest millimetre" which again is quite clearly wrong. Urgh. If only I'd checked thoroughly.

By the way, did you find that, after STEP/AEA preperations, C4 seemed sooo much simpler than it used to?
I find C3/4 really easy because of STEP/AEA prep

I realised as soon as I went through it with people who also sat it that I'd made a mistake on the last bit of the comprehension, I remember at first thinking its not even to the nearest metre for some reason or some other thing :\. Hopefully I'll still get 1 or 2 of the marks though for having the right idea.
19. DOUBLE DAMNIT - I think I labelled the x-intercepts and y-intercepts of the graph of the ellipse the wrong way round!

Easy marks lost!

Don't you just hate when you don't find out about these mistakes until after the exam?
20. (Original post by Jk.d)
Hmm.. I think I put

That should only cost about 1 or 2 marks?
I did that too

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