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# Edexcel C4 integration Tweet

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IMPORTANT: You must wait until midnight (morning exams)/4.30AM (afternoon exams) to discuss Edexcel exams and until 1pm/6pm the following day for STEP and IB exams. Please read before posting, including for rules for practical and oral exams. 28-04-2013
1. Edexcel C4 integration
There are so many ways to integrate. How can I instantly realise which method I am supposed to use if they do not state it ?
2. Re: Edexcel C4 integration
Anyone ?
3. Re: Edexcel C4 integration
With all due respesct you have had x months to learn it yet want someone to tell you within 50 minutes of you first asking.

You can do some by inspection, ie reversing the chain rule
You can do some by parts, which often you are told to do, which will be where you have a product
You may get f'(x)/f(x) which will give you ln|f(x)|
Some trig intergals will just be done by standard results
Some you can just expand and integrate as a sum (as you would have done in C1/C2)

Its about taking time to learn and spot them.
4. Re: Edexcel C4 integration
(Original post by kozo)
With all due respesct you have had x months to learn it yet want someone to tell you within 50 minutes of you first asking.

You can do some by inspection, ie reversing the chain rule
You can do some by parts, which often you are told to do, which will be where you have a product
You may get f'(x)/f(x) which will give you ln|f(x)|
Some trig intergals will just be done by standard results
Some you can just expand and integrate as a sum (as you would have done in C1/C2)

Its about taking time to learn and spot them.
With all due respect ? I know integration well, I think you havn't read my post properly. I am asking, if there is an easier way to notice what method to use, because some times i end up trying a method that doesnt work for a particular case and then i have to get it on my second attempt with another method. Like substitution and by parts, theyre used in two similar cases. I'm simply asking if anyone has any tips in spotting which method to use. No need to troll on this thread.
Last edited by iAre Teh Lejend; 10-06-2012 at 15:56.
5. Re: Edexcel C4 integration
Ok, I shall sit back and happily read a post that can condense all the integrals for polynomial and transcendental functions in an all encompassing sweep.
6. Re: Edexcel C4 integration
(Original post by kozo)
Ok, I shall sit back and happily read a post that can condense all the integrals for polynomial and transcendental functions in an all encompassing sweep.
Cool story bro.
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