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# Edexcel C3,C4 June 2013 Thread watch

1. Kate and john can smd if they appear tomorrow

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2. (Original post by Story)
I got up to integrate 1/4+u * 2u . du am I along the right lines?
Is that:

If so, did you take the substitution ?

I suggest taking the substitution of , it's far easier that way.

(Original post by otrivine)
Can I integrate using the sub method?

or can I use integral sign , a^x/Ina +C ?
Sorry, what question's this?
3. (Original post by wndms)
I started today. I think its better than nothing

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Started them on Saturday and managed to finish them all by today There good help for the harder questions (There vector questions are harder)
4. (Original post by usycool1)
Is that:

If so, did you take the substitution ?

I suggest taking the substitution of , it's far easier that way.

Sorry, what question's this?

Do you not get the same thing if you differentiate that as u ?
5. Can someone please send me the leaked paper for june 2012 c4?
6. Anyone know how to integrate x/(x+1)?

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Fir part c) I know you have to equate dy/dx to 0. But then what do you do after? The answer is supposed to be (pi,-1). I don't understand .. thanks!

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8. (Original post by wndms)
Fir part c) I know you have to equate dy/dx to 0. But then what do you do after? The answer is supposed to be (pi,-1). I don't understand .. thanks!

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sub into y.
9. (Original post by DonkBets)
i used the limits 2 and 0.5 too, but my answer was wrong.
I kinda hope it comes up tomorrow now ^^ (i missed out a step in part c, if you want it explaining just ask)
10. Does anyone have the june 12 leaked paper and mark scheme for c4?
11. (Original post by wndms)
Fir part c) I know you have to equate dy/dx to 0. But then what do you do after? The answer is supposed to be (pi,-1). I don't understand .. thanks!

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12. (Original post by usycool1)
Is that:

If so, did you take the substitution ?

I suggest taking the substitution of , it's far easier that way.

Sorry, what question's this?
13. (Original post by linamoore)
Does anyone have the june 12 leaked paper and mark scheme for c4?
Mark Scheme: http://www.thestudentroom.co.uk/atta...7&d=1369299296
14. (Original post by wndms)
Fir part c) I know you have to equate dy/dx to 0. But then what do you do after? The answer is supposed to be (pi,-1). I don't understand .. thanks!

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How do you even do question part a or b?
:/.
15. (Original post by AHarris)
Anyone know how to integrate x/(x+1)?

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16. (Original post by PoorLoser)
can you give an example of a question of this type?
I can't think of an example in a paper or in the textbook (I know there was at least one, but I can't remember which one it would be!), but an example would be if you were taking the integral of 1/x between -3 and -2
17. (Original post by justinawe)

Would you consider that to be a harder integrand? It doesnt seem clear that thats how ts is done.

Thanks
18. Anyone have the paper for this?
19. I have no idea how to answer any vector questions but I should be okay at getting 70 UMS+ as long as they only ask 1 vector question. Have any past papers asked more than 1 vector question?
20. can anyone write me the solution in a sheet for the question 7c) (28 january 2012 paper)...im so confused..!!thanks in advance!!

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Updated: September 24, 2013
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