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# Edexcel A2 C4 Mathematics June 2016 - Official Thread watch

1. Does anyone know if they usually give you certain formula in questions such as "find the rate of change of the volume of this cone"? or do I need to know all the volume formula?
2. (Original post by Gitty)
has anyone done the june 2016 C34 IAL paper yet - this exam was 2 days ago? The C3 questions in it were very similar to the ones that we had on our paper. Maybe with a bit of luck we may have similar C4 questions that were on that paper..
I'm going to do it now, only the c4 bits of course. Hopefully we get lucky.
3. For an integration question, if its ask for an exact value you give it as a decimal how many marks do u get
4. (Original post by Lilly1234567890)
guys you know when they ask you to 'use your approximation to estimate an approximate value of blah blah and you have to find X. how do you find x.? for example, ques 4b here:

http://qualifications.pearson.com/co...e_20130618.pdf
(7100)^1/3 = (7.1)^1/3 * (1000)^1/3 = 10 (7.1^1/3) [Law of surds]
7.1 = 8 - 9x, x = 0.1

Plug in this value of x into your expansion and voila, an approximation.

Edit: just noticed the mod x limitation.
5. So you're looking for 7100^1/3, but you need to remember that mod x < 8/9

So you need to realise that you should find the value of x to give the cube root of 7.1, (which gives x=0.1), and then multiply your estimate by 10 to give the cube root of 7100:

(7100)^1/3
=(7.1x1000)^1/3
=1000^1/3 x 7.1^1/3
=10 x 7.1^1/3

Edit: Hopefully the person that asked sees this, not sure why it didn't quote 🙄
6. Anyone else always make stupid mistakes? Like I just did a 9 marker and would have got it right, but I wrote sec^2x down and then next line changed it so sin^2x

Anyone have any tips on how to avoid making these sort of mistakes?
7. Is there a link to the IAL paper for this year? I'd like to have a go at the C4 parts for some new material!
8. (Original post by NotNotBatman)
I'm going to do it now, only the c4 bits of course. Hopefully we get lucky.
where can you get the paper?
9. (Original post by Don Pedro K.)
I just figured it out haha xD Thanks anyway !
wait why didnt AB.BC work? also what year was that from?
10. http://www.thestudentroom.co.uk/show....php?t=4181092
(Original post by AlannahK)
Is there a link to the IAL paper for this year? I'd like to have a go at the C4 parts for some new material!
http://www.thestudentroom.co.uk/show....php?t=4181092

11. (Original post by raman_17)
where can you get the paper?
http://www.thestudentroom.co.uk/show....php?t=4181092
12. (Original post by ccharlie97)
No you wouldn't have to! But it would be easier to do algebra with (1,2,4) rather than (6,12,24) - it's just the value of will be different in
but you can use (6,12,24) right? because in Q7 of this paper I got wrong answer using the this method.

13. Thank you! Good luck for tomorrow
14. thank you very much............... ready for c4??
15. (Original post by AlannahK)
Thank you! Good luck for tomorrow
Good luck to you too!!
16. (Original post by M&F)
but you can use (6,12,24) right? because in Q7 of this paper I got wrong answer using the this method.

You wouldn't have the got wrong answer any of the direction vectors parallel to (1,2,4)! All you'd get is a different value of ! Try it again if it didn't work
17. (Original post by raman_17)
thank you very much............... ready for c4??
yes! Are you ready? Good luck
18. Can someone help me with this question please! How do u re arrange the diff eqn
19. (Original post by maruchan)
yes! Are you ready? Good luck
nearly there............... just gotta do this paper (obviously c4 parts) and read some maths notes. Thanks....... likewise

by the way how did u find c3??
20. (Original post by raman_17)
nearly there............... just gotta do this paper (obviously c4 parts) and read some maths notes. Thanks....... likewise

by the way how did u find c3??
It was OK. What do you think's going to come up tomorrow? Hopefully it'll be a nice paper! btw how did you find the c3?

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