# Edexcel C4 June 2009 Thread :)Watch

This discussion is closed.
9 years ago
#621
(Original post by Becstasy)
4.20am man i'm dead

can't someone tell me how to do intergration by substitution?

x(x+2)^2 dx

u=x+2

??? =( I'm so tired I'm trying to learn it all over night.. I'm going to fail this paper but might as well try last minute lmao :/
i think, u change the dx to du
so diff u=x+2
giving du/dx=1
so dx =du/1

substitute u and dx into the main equation
f(x)= (u+2)u^2 du

not 100%sure though, i gave up on c4, it just wont get in my head
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9 years ago
#622
(Original post by candle)
anyone has june 08 and jan 09 marking scheme?
http://www.freeexampapers.com/Dndex....L0M0&catagory=
there u go, enjoy urself

hv u done jan 09 q2?
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9 years ago
#623
morning. gd luck with exam. im off to the library!
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9 years ago
#624
http://www.edexcel.com/migrationdocu...r_MkScheme.pdf

Here is a link to the specimen paper, Ive done most of the paper so far and it looks pretty good so far but I'm not finished yet!!
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9 years ago
#625
If you need help with C4, go on www.examsolutions.co.uk, it has about 5 recent maths papers and has video tutorials, which takes you through every question.
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9 years ago
#626
(Original post by Becstasy)
4.20am man i'm dead

can't someone tell me how to do intergration by substitution?

x(x+2)^2 dx

u=x+2

??? =( I'm so tired I'm trying to learn it all over night.. I'm going to fail this paper but might as well try last minute lmao :/
its hard to explain step by step but i learnt it here. http://www.examsolutions.co.uk/A-Lev...n/contents.php

Good Luck
0
9 years ago
#627
anyone knows what formulas are there in the formula book?
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9 years ago
#628
(Original post by MR.PINK)
http://www.freeexampapers.com/Dndex....L0M0&catagory=
there u go, enjoy urself

hv u done jan 09 q2?
thanks , yh i did that question.
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9 years ago
#629
(Original post by candle)
anyone knows what formulas are there in the formula book?
http://www.edexcel.com/migrationdocu...cification.pdf

Enjoy
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9 years ago
#630
candle the main ones u will find are the intergral of the the same c3 differentals. those are the main ones. and intergration by parts formulae as well as trapezium rule.
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9 years ago
#631
fail dot com
0
9 years ago
#632
so basically if u have the c3 formulae sheet, u just need to knw the inverse of those differentials.
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9 years ago
#633
(Original post by Becstasy)
fail dot com
fail.com/kaz310
0
9 years ago
#634
Thought you were going to get AN A?! v_v

I'm gonna eat my breakfast then go in to crack these differential equations with an experienced member of staff
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9 years ago
#635
I think I have reached my breaking point....
0
9 years ago
#636
(Original post by Little_Jacob)
Thought you were going to get AN A?! v_v

I'm gonna eat my breakfast then go in to crack these differential equations with an experienced member of staff
i am i am

lol its just the pressure is getting to me..and forget breakfast theres no time!! even tho i had time for coco pops
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9 years ago
#637
(Original post by Sapphire Rose)
I think I have reached my breaking point....
well now wasnt the right time was it? wooo i just did a whole vector question correct! 12/12 june 08
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9 years ago
#638
isit just me or are the last part of the vector questions always reallllly hard?
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9 years ago
#639
(Original post by Kaz310)
well now wasnt the right time was it? wooo i just did a whole vector question correct! 12/12 june 08

I know!

Well done on getting the vectors right! They can be tricking...

Actually... every question can be tricky... I hope they are kind to us!
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9 years ago
#640
(Original post by Sapphire Rose)
I know!

Well done on getting the vectors right! They can be tricking...

Actually... every question can be tricky... I hope they are kind to us!
i know! argh i cant seem 2 do intergration by sub! its impossible!!
i hope they are though! c3 was realllyy easy paper!
are u stuck on any?
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