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# Ocr C4 - 20/06/05 watch

1. Good luck everyone. post comments on the paper here
2. yeah good luck everyone i reck its gonna b a nasty paper!
3. how did everyone find it?
4. I thought it was hard
5. i thought it could have been alot worse! can anyone remember what answers they got for stuff?
6. the paper wasn't that bad really...
but just a lot of working...

be honest...I ain't a efficient writer... so I kinda rushed a bit.
7. i thought there were some tricky questions, the final part of the implicit differentiation question seemed quite difficult but i think i got the answer in the end.. does any1 remember what they got for the value of the parameter on the parametric equation, i think i got t=4...
8. (Original post by Brigand)
i thought there were some tricky questions, the final part of the implicit differentiation question seemed quite difficult but i think i got the answer in the end.. does any1 remember what they got for the value of the parameter on the parametric equation, i think i got t=4...
yep i got 4 as well
for the implicit one how did u do the prove no tangents parallel to y axis bit?
9. tangents parallel to y axis have gradient infinity, so the bottom part of the fraction of dy/dx must equal 0
2xy - 3 = 0
y= 3/(2x)

sub this into the original equation to obtain a quadratic and then show that it has no real roots. took me 20 mins in the exam to work this out
10. yay thats what i did!
11. That exam was SO darn easy. I actually couldn't believe it. It's messed up my brain totally because I thought that it was going to be so hard! I got t=4 aswell! Did anyone get time=10.8 mins for the very last question?

12. i rounded it to 10 and three quarter minutes. i did it wrong at first and got 2.7 minutes and tought: nah this cant be right. worked it out again and got the right answer
13. Hi, I thought c4 was a pretty good exam, completely surprised me, because I was sure it would be really hard. I also got t=4 and 10.8 for the last part of the last qu.

Joanne
14. Woo hoo!! That binomial question was a bit mean didn't you think? It was worth hardly any marks!
15. the binomial was a stinker. took sooo long for only 5 marks
666 posts! is it a sign?!?
16. (Ahhhhhhhhhhh 666 posts Undry1!!!)

Can anyone remember the answer for the vector question where you had to fing the perp. vector?? I think I got (4,0,?)
17. havent got the faintest idea what i got for the vector. wot did u get for the angle between the lines?
18. 86 degrees (I think!)
19. yaaaay!!! i got the same. was quite worried because after i finished the paper i just could not be bothered to check my answers
20. Sounds like we've both done pretty well!!! It makes up for my abysmal M1!! Roll on 18th August!! Got any more exams???

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