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Edexcel C3,C4 June 2013 Thread watch

1. (Original post by usycool1)
Yeah.
Hi

was that integrating or differentiating /?
2. I'm scared.
3. (Original post by Knoyle quiah)
how do we know the limits for the last part of this question?? I thought you just find t value when x=1 and then when x=2.5, why am I wrong????
is the answer to this either 3/8 or
ln(1/4) -27/8 by any chance?
4. hey is it worth going through soloman papers this late?
5. (Original post by otrivine)
Hi

was that integrating or differentiating /?
Integrating
6. Was this leaked like [the paper which shall not be named]?
7. guys, ive given up
ive done 0 revison for c4
i cant understand any of it
8. Anyone got a list of all the volume/areas of shapes we need to know?
For questions like rates of change etc
9. (Original post by vengeance111)
guys, ive given up
ive done 0 revison for c4
i cant understand any of it
How can you give up revising if you never started?
10. (Original post by DonkBets)
is the answer to this either 3/8 or
ln(1/4) -27/8 by any chance?

Sorry not them, cant remember the answer now, but am pretty sure wasnt either of them, as i have put them in my calculator and remember not seeing them numbers
11. (Original post by usycool1)
Integrating
Can I integrate using the sub method?

or can I use integral sign , a^x/Ina +C ?
12. (Original post by vengeance111)
guys, ive given up
ive done 0 revison for c4
i cant understand any of it
Same here! It's seems to get harder by the day.
13. Has anyone come across the error of estimate ..how do you calculate that thanks in advance

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14. (Original post by Knoyle quiah)
Sorry not them, cant remember the answer now, but am pretty sure wasnt either of them, as i have put them in my calculator and remember not seeing them numbers
do you know what book that question is from or where i would be able to find the answer?
15. (Original post by kuku2013)
hey is it worth going through soloman papers this late?
I started today. I think its better than nothing

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16. (Original post by noeliah4)
Has anyone come across the error of estimate ..how do you calculate that thanks in advance

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(original estimate - Real value)/ Real value

17. (Original post by usycool1)
Yeah.
I got up to integrate 1/4+u * 2u . du am I along the right lines?
18. I've just a fall out with my notes, was fine this morning now just seem to not even be able to do Binomial expansion
19. (Original post by Knoyle quiah)
Sorry not them, cant remember the answer now, but am pretty sure wasnt either of them, as i have put them in my calculator and remember not seeing them numbers
I was going through what I believe is this question today with my teacher (edexcel c4 textbook, review exercise, question 74) A) the diagram in the book is wrong, it should cross the x axis at (2,0) NOT 1,0 as it shows. B) I'm terrible at explaining, but the limits you use are the t values from part a) , 0.5 and 2. The explanation was something like all the values given, t is an increasing value, as shown in part b, so you are integrating the t values and you disregard the (x,y) graph. Hope that helped. ps, I've done all the past papers and have never seen a question like it
20. (Original post by excal9)
I was going through what I believe is this question today with my teacher (edexcel c4 textbook, review exercise, question 74) A) the diagram in the book is wrong, it should cross the x axis at (2,0) NOT 1,0 as it shows. B) I'm terrible at explaining, but the limits you use are the t values from part a) , 0.5 and 2. The explanation was something like all the values given, t is an increasing value, as shown in part b, so you are integrating the t values and you disregard the (x,y) graph. Hope that helped. ps, I've done all the past papers and have never seen a question like it
i used the limits 2 and 0.5 too, but my answer was wrong.

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