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1. (Original post by aersh8)
How would you use arctan though?
2. (Original post by TeeEm)
Edexcel A2 normal maths, AS further maths
3. (Original post by aersh8)
Edexcel A2 normal maths, AS further maths
then you have more work, in terms of substitutions

it is easier if you know that d/dx(arctanx) = 1/(1+x2)

By the way how did you manage these partial fractions if you are at EDEXCEL?
(they are not covered in their Maths or Further Maths)
4. (Original post by TeeEm)
then you have more work, in terms of substitutions

it is easier if you know that d/dx(arctanx) = 1/(1+x2)

By the way how did you manage these partial fractions if you are at EDEXCEL?
(they are not covered in their Maths or Further Maths)
Alright, my method is right at least I might have another go tomorrow to try doing it without any careless mistakes

I formed simultaneous equations using different values of x and solved them - we don't need to do that for exam purposes but it works

Could you please the arctanx thing, seems interesting!
5. (Original post by aersh8)
Alright, my method is right at least I might have another go tomorrow to try doing it without any careless mistakes

I formed simultaneous equations using different values of x and solved them - we don't need to do that for exam purposes but it works

Could you please the arctanx thing, seems interesting!
the partial fractions are correct!

so take it from there when you have a clear head.

I will put solutions up in a couple of days
6. (Original post by aersh8)
Alright, my method is right at least I might have another go tomorrow to try doing it without any careless mistakes

I formed simultaneous equations using different values of x and solved them - we don't need to do that for exam purposes but it works

Could you please the arctanx thing, seems interesting!

PS you did better than any of my current students!...
hope you have a good exam session after the half term.
7. (Original post by TeeEm)
PS you did better than any of my current students!...
hope you have a good exam session after the half term.
Thanks!
8. useful material for the upcoming exams

http://www.thestudentroom.co.uk/show....php?t=3353445

http://www.thestudentroom.co.uk/show....php?t=3361867

http://www.thestudentroom.co.uk/show....php?t=3361905
9. (Original post by TeeEm)
x

Hey can you help me with this question please. I'm really stuck! I can do up to part (c) correctly. But for (d) and (e) I am lost. Please help
10. (Original post by kprime2)

Hey can you help me with this question please. I'm really stuck! I can do up to part (c) correctly. But for (d) and (e) I am lost. Please help
(d)
draw lamina in a horizontal position
mark weight at G, External force, horizontal reaction X at O, vertical reaction Y at O.
find external force.
(e)
resolve horizontally and vertically
find X and Y
find magnitude

11. Any ideas why you can't use the residue theorem?
12. (Original post by rayquaza17)

Any ideas why you can't use the residue theorem?
I am not a purist but logz has a branch cut which prevents you to do this for a "second turn" around the circle.
(it is like going up a spiral staircase, so you cannot close your contour)
13. (Original post by TeeEm)
I am not a purist but logz has a branch cut which prevents you to do this for a "second turn" around the circle.
(it is like going up a spiral staircase, so you cannot close your contour)
I see, thanks!

Oh and thanks again for all of your help this year. My last non-stats exam is tomorrow so you won't be pestered by any questions from me for a while!
14. (Original post by rayquaza17)
I see, thanks!

Oh and thanks again for all of your help this year. My last non-stats exam is tomorrow so you won't be pestered by any questions from me for a while!
no worries
15. Two brand new differential equations with related rates of change suitable for EDEXCEL students mainly.
They were made in one of my revision lesson today, and are of "general consumption difficulty" as my student finds the topic hard.
16. Two brand new differential equations with related rates of change suitable for EDEXCEL students mainly.
They were made in one of my revision lesson today, and are of "general consumption difficulty" as my student finds the topic hard. Solutions on Sunday
Attached Images
17. NEW ODE 1.pdf (19.3 KB, 69 views)
18. NEW ODE 2.pdf (19.8 KB, 83 views)
19. Two brand new integration suitable for able students mainly.
They were made in one of lessons today.
Solutions on Sunday Evening
Attached Images
20. NEW.PDF (15.9 KB, 74 views)
21. Hi again! I did the C3 paper T you have on your website, where does a score of around 50-51/75 (I used the fraction of how far I got through a solution to estimate how much I got for that question) stand in your opinion?
Also I think there's a simpler way of solving 5 (although it may just seem simpler to me)

Thanks for making those!

Edit: I only spent an hour on it though, do you think that some more fiddling during the allowed time limits would have lead to a better score?
22. (Original post by aersh8)
Hi again! I did the C3 paper T you have on your website, where does a score of around 50-51/75 (I used the fraction of how far I got through a solution to estimate how much I got for that question) stand in your opinion?
Also I think there's a simpler way of solving 5 (although it may just seem simpler to me)

Thanks for making those!

Edit: I only spent an hour on it though, do you think that some more fiddling during the allowed time limits would have lead to a better score?
It is very hard to judge ordinary exam performance based on these two unique papers (S and T).

"ordinary maths students" can still get full marks in the actual exam and get sub30 scores in this paper.

similarly a "top maths student" can score very high 60+ and miss full marks on the actual due to some silly error.

PS
many questions can be done in more than one way.
If mathematically correct then full marks!
23. (Original post by TeeEm)
It is very hard to judge ordinary exam performance based on these two unique papers (S and T).

"ordinary maths students" can still get full marks in the actual exam and get sub30 scores in this paper.

similarly a "top maths student" can score very high 60+ and miss full marks on the actual due to some silly error.

PS
many questions can be done in more than one way.
If mathematically correct then full marks!
I see would a score of 50 be okish for this paper, or is it weak (not related to edexcel exams)?

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