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# Edexcel C4 Revision Thread (28/06 14:00) watch

1. List of papers for practice (Right Click link..then Save As):

Specimen paper:Click Here
Mock paper: Click Here
Mock Paper Mark Scheme: Click Here (Pg1), Click Here (Pg2)
Solomon Papers: Click Here
Solomon Papers Mark Schemes: Click Here
Edexcel Practice Papers: Click Here
Edexcel Practice Papers Mark Schemes: Click Here
Zig Zag Papers: Click Here
Zig Zag Papers Mark Schemes: Click Here
Paper consists of past questions: Click Here
Paper cosists of past questions Mark Schemes: Click Here

You won't have time to do all the papers, so I would do the specimen and mock first, then the Edexcel practice papers, then the Solomon ones. That's already like 20 papers, so if you have spare time, I'd probs have a look at the Zig Zag ones.

Summary sheet (thanks to SamDavyson ): Click Here
2. can someone do this question for me

evaluate
∫[2/(x-3)] - [1/(x+4)] ∂x

Between 2 and 0
3. (Original post by nas7232)
can someone do this question for me

evaluate
∫[2/(x-3)] - [1/(x+4)] ∂x

Between 2 and 0
I like to integrate and then apply the limits, to get the hard stuff out of the way right at the start.

∫[2/(x-3)] - [1/(x+4)] ∂x => 2ln(x - 3) - ln(x + 4)

Now the limits are 2 and 0:

(2ln(1) - ln(6)) - (2ln(3) - ln(4))

=> ln(1/6) - ln(9/4)

=> ln(2/27) ≈ -2.60626...

Is that right?
4. (Original post by TheWolf)
1.www.gmail.com
2.
Username: thestudentroom
Password: tsrmathmos
That is a brilliant idea.

It could be a revolutionary new way to store the exam papers away from bots from search engines etc. Especially with 2GB+ storage.
5. Just drew that graph on autograph, and it looks wierd lol, and it does not particularly want to draw the integral graph, so I drew it on myself
6. Don't they sometimes come out negative if they are under the axis?

Edit: the post this refers to as disappeared.
7. (Original post by KAISER_MOLE)
Just drew that graph on autograph, and it looks wierd lol, and it does not particularly want to draw the integral graph, so I drew it on myself
Have you got a screen shot?
8. (Original post by samdavyson)
I like to integrate and then apply the limits, to get the hard stuff out of the way right at the start.

∫[2/(x-3)] - [1/(x+4)] ∂x => 2ln(x - 3) - ln(x + 4)

Now the limits are 2 and 0:

(2ln(1) - ln(6)) - (2ln(3) - ln(4))

=> ln(1/6) - ln(9/4)

=> ln(2/27) ≈ -2.60626...

Is that right?
yep that's right, the answer was ln [2/27]

how did you get to this stage (2ln(1) - ln(6)) - (2ln(3) - ln(4)) from 2ln(x - 3) - ln(x + 4)
9. (Original post by nas7232)
yep that's right, the answer was ln [2/27]

how did you get to this stage (2ln(1) - ln(6)) - (2ln(3) - ln(4)) from 2ln(x - 3) - ln(x + 4)
oh how stupid of me, you just put 2 and 0 in.

It's negative because the limits are the bit where the curve is below the x-axis i think.
10. Links updated. Gmail idea abandoned to avoid people abusing it.
11. just tried to download the edexcel practice papersby clicking the link above and it just displays a load of ramdom symbols, letters and numbers?????????
12. Try right click --> save as?
13. ok great, i changed the file extension to zip and it seemed to work!! its html at the moment.
14. Hmm The links should work if you right click then save as. Can someone check for me plz?
15. (Original post by KAISER_MOLE)
Just drew that graph on autograph, and it looks wierd lol, and it does not particularly want to draw the integral graph, so I drew it on myself
kaiser how did u get autograph???...i has been searching far and wide for it
16. http://www.autograph-math.com/downloads/

Is this the one?
17. Has anyone got the mark scheme for all the Practice Questions (the ones from MH)?

I know it says "too big to host" above but does anyone have it at all?
18. Only a trial though.
19. Most are readable.

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