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# OCR C4 (not mei) 18th June 2013 revision watch

1. I thought i'd start a thread for C4 OCR.

Can anyone help me on this question:

Expand binomially: 3/(2-x) + 3(1+x) +1/((1+x)^2)

Well i know you have to convert it into (1-x) for the first one... but yeah...
2. (Original post by master y)
I thought i'd start a thread for C4 OCR.

Can anyone help me on this question:

Expand binomially: 3/(2-x) + 3(1+x) +1/((1+x)^2)

Well i know you have to convert it into (1-x) for the first one... but yeah...
3. Need 91 in this for an A*!
4. (Original post by erniiee)
Need 91 in this for an A*!
I need 93
5. I haven't even started revising
6. (Original post by master y)
I need 93
So do you think its true? That C4 is "easier" than C3? So far I much prefer C3
7. (Original post by erniiee)
So do you think its true? That C4 is "easier" than C3? So far I much prefer C3
I prefer C3 too, and i've heard C4 can be a right pain in the backside sometimes. Some of my friends sat the january exam, and came out with appalling results, and they are going to study maths/economics/engineering at oxbridge! I'm just a mere medic
8. (Original post by master y)
I prefer C3 too, and i've heard C4 can be a right pain in the backside sometimes. Some of my friends sat the january exam, and came out with appalling results, and they are going to study maths/economics/engineering at oxbridge! I'm just a mere medic
Ah not what I want to here Same here, I actually need 1 A* to meet my offer - wasn't originally expecting it from Maths but I think it's achievable!
9. Anyone got a good website for C4 Vectors? Any other decent resources for C4 are appreciated too
10. (Original post by Big Bad Boss)
Anyone got a good website for C4 Vectors? Any other decent resources for C4 are appreciated too
you may have already seen this but... http://www.examsolutions.net/maths-r.../C4/module.php
11. Does anyone know how to answer june 2008 Q4ii, and Q9iii please?

http://www.ocr.org.uk/Images/62967-q...hematics-4.pdf

thanks!
12. Haven't done C3 like most people have... But I'm doing this paper... Nervous as I need to maintain my A by receiving an average of high Bs in S1 (resitting), C3 & C4... Going to try and aim for the A* though!

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13. (Original post by erniiee)
Ah not what I want to here Same here, I actually need 1 A* to meet my offer - wasn't originally expecting it from Maths but I think it's achievable!
I feel stupid for not doing this but how do you simplify,

(20-5x)/(6x^2 - 24x)
14. (Original post by master y)
I feel stupid for not doing this but how do you simplify,

(20-5x)/(6x^2 - 24x)
15. (Original post by master y)
I feel stupid for not doing this but how do you simplify,

(20-5x)/(6x^2 - 24x)
As above, thanks Quest!
16. (Original post by Quest)
ahhh cheers dude!
17. sorry, i seem to be the only one who has questions haha!

A curve has parametric equations x= 3(t), y = sin(2t)

what is dy/dx? I cant differentiate dx/dt for some reason... well i wrote it in terms of sin(2t).. which is - 2t... but it doesn't work! I'm supposed to get dy/dx = (cot(2t))

(Original post by erniiee)
.

(Original post by Quest)
.
urgh, and how do you write in this latex thing quickly! I have to keep copying and pasting...
18. I'm doing C4 in June! It will be my last ever A-Level exam!!! (Hopefully!!)

Personally I think it's quite a bit easier than C3! I got 79/100 in C3 and I need an A overall so get into Uni so anything over 80 in C4 will be good!

So far:
C1: 79, C2: 84, C3: 79, C4: ?, D1: 62 (Re-sitting), S1: ?
19. please someone help!! last question June 2009... HOW DO I DO THIS?? I found C, but do i need to find k?
IM DESPERATE.
20. Does anyone know how to know the value of x for which the expansion is valid. Eg. (1+4x)^(3/2)
I got x<= -1/4 but the mark scheme says (mod x )< 1/4.... HOW DOES THIS WORK? aaaaaaaarghhhhhhhh

Thanks

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