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# Will the real TeeEm please stand up! watch

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1. (Original post by TeeEm)
I shall have a go tomorrow, thanks for your help! PRSOM
2. (Original post by TeeEm)
Quick question. How come the sides of he rectangle are 4a and a respectively? Surely you can only relate them like this if this information is given in the question?
3. (Original post by Gilo98)
Quick question. How come the sides of he rectangle are 4a and a respectively? Surely you can only relate them like this if this information is given in the question?
clearly ! did this in a hurry and forgot to add this bit of information in the text.

sorry
4. (Original post by TeeEm)
clearly ! did this in a hurry and forgot to add this bit of information in the text.

sorry
No worries I presumed that was the case. The method you used was what was important to me anyway.
5. disgusting differential equation ...
any takers

(I planning to put this question as the last question in the IYGB Special Paper S)
Attached Images
6. Document1.pdf (12.5 KB, 90 views)
7. UPDATE ON I.Y.G.B SPECIAL PAPERS

So far uploaded in my site

Paper Z (final draft)
Paper Z (solutions)

Paper Y (final draft)
Paper Y (solutions)

Paper X (final draft)
Paper X (solutions)

Paper W (final draft)
Paper W (solutions)

Paper V (final draft)
Paper V (solutions)

Paper U (final draft)
Paper U (solutions)

Paper T (final draft)
Paper T (solutions)

Paper S (final draft)
Paper S (solutions)

Paper R (first draft)

NOTE that the solution files will be withdrawn after a short period of time as some teachers asked me to.

also look at
http://www.thestudentroom.co.uk/show....php?t=3595397
8. To the people asking I can assure my site now is up to date.
determine the value of a, a>0, for which the integral gives zero

any takers?
10. Any good method for this?
(please attach I do not have home-works any more!!!)

I have the correct answer (which is part of an undergrad question to which I am writing a solution)
It is just that the method seems a bit too long and I do not want to rewrite the solution as this integral lies somewhere in the middle of a longish problem

Thanks
Attached Images

11. (Original post by TeeEm)
Any good method for this?
(please attach I do not have home-works any more!!!)

I have the correct answer (which is part of an undergrad question to which I am writing a solution)
It is just that the method seems a bit to long and I do not want to rewrite the solution as this integral lies somewhere in the middle of a longish problem

Thanks
Can it be done using A level methods? Im thinking hyperbolic.

Posted from TSR Mobile
12. (Original post by TeeEm)
Any good method for this?
(please attach I do not have home-works any more!!!)

I have the correct answer (which is part of an undergrad question to which I am writing a solution)
It is just that the method seems a bit to long and I do not want to rewrite the solution as this integral lies somewhere in the middle of a longish problem

Thanks
What is the answer? I did...something, but it's weird
13. (Original post by physicsmaths)
Can it be done using A level methods? Im thinking hyperbolic.

Posted from TSR Mobile
All standard A level techniques except the infinity limit
14. (Original post by 13 1 20 8 42)
What is the answer? I did...something, but it's weird
it is a mess to type

take the limit of the answer as k tends to zero

you should get 2pi
15. (Original post by TeeEm)
it is a mess to type

take the limit of the answer as k tends to zero

you should get 2pi
Got pi first but just forgot to account for chain rule on the arctan
Separating into two logs and then using IBP on both is fairly quick no? I guess It's not very pretty. And it's assuming the derivative of arctan is expected knowledge
16. (Original post by 13 1 20 8 42)
Got pi first but just forgot to account for chain rule on the arctan
Separating into two logs and then using IVP on both is fairly quick no? I guess It's not very pretty. And it's assuming the derivative of arctan is expected knowledge
I will try
I missed direct integration by parts
I did a substitution then parts which makes it longer.

My brain is totally fried

thanks
17. I've got some cool integral questions somewhere, I hope TeeEm won't mind if I post one or two here occasionally?

Here's some of the easiest:

Got lots of integral questions, not sure where they're from, but I printed them off in Year 12, and I don't recognise any of them from STEP
18. (Original post by Johann von Gauss)
I've got some cool integral questions somewhere, I hope TeeEm won't mind if I post one or two here occasionally?

Here's some of the easiest:

No problem

the first one is famous

the second not sure .... is it hard without limits?
19. (Original post by TeeEm)
No problem

the first one is famous

the second not sure .... is it hard without limits?
First one is probably a classic, second one is very easy

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