Will the real TeeEm please stand up!

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For question 3 in the 2014 paper, any specific strategy on approaching the sketches? I mean there's nothing wrong with part (i) but not really sure how to approach parts (ii) and (iii)

from my "secret stash" of modulus

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HARD MODULUS 1.pdf636.1KB

HARD MODULUS 2.pdf456.5KB

b8.jpg5.9KB

Reply 581

Bendak

Original post by TeeEm

from my "secret stash" of modulus

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I appreciate your help! These will be very useful to me, thank you :smile:

Reply 582

TeeEm

Original post by Bendak

Do you mind posting your answers to Q4 of the 2014 paper? Sorry to be a bother but warwick don't have solutions up for that paper and the mark scheme is very unclear as to what they're doing!

sure

AEA, June 2014, Q4, page 1.jpg515.1KB

AEA, June 2014, Q4, page 2.jpg503.7KB

Reply 583

Bendak

Original post by TeeEm

sure

thanks again! Just want to ask, in part (a), when you factor out the -1/2, why is it raised to the power of r? Isn't it just a matter of factoring out the -1/2 or is there something I'm not getting?

Reply 584

TeeEm

Original post by Bendak

thanks again! Just want to ask, in part (a), when you factor out the -1/2, why is it raised to the power of r? Isn't it just a matter of factoring out the -1/2 or is there something I'm not getting?

I factorised 1/2 from every single term
(it is a standard way of manipulating, in order to create factorials

Reply 585

Bendak

Original post by TeeEm

I factorised 1/2 from every single term
(it is a standard way of manipulating, in order to create factorials

Ohh, i see. last question sorry, what do you do in the last step when going from sum from 1 to sum from 0 that makes the +1 disappear?

Reply 586

TeeEm

Original post by Bendak

Ohh, i see. last question sorry, what do you do in the last step when going from sum from 1 to sum from 0 that makes the +1 disappear?

I put the 1 inside the summation but now the summation starts from r=0

Reply 587

TeeEm

Original post by physicsmaths

I am a pain but I was looking for what your comments would be for the S+ marks as i listed before. I can't see them on the solution i think

Posted from TSR Mobile

if you are asking about S marks for this paper look at the second page

AEA, June 2014, GUIDELINES.pdf41.4KB

Reply 588

username1162972

Original post by TeeEm

if you are asking about S marks for this paper look at the second page

I meant what would the comment be about the r=0 case as they dont say. Would you just say the term is 1 for a and 0 in part c?
Sorry for the constant bothering btw.

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Reply 589

TeeEm

Original post by physicsmaths

I meant what would the comment be about the r=0 case as they dont say. Would you just say the term is 1 for a and 0 in part c?
Sorry for the constant bothering btw.

Posted from TSR Mobile

are you looking in AEA 2014 question 4?

The question does not ask you to comment anywhere unless I have a bad copy.

are you perhaps asking me if you have to justify how the 1 disappears?

Reply 590

username1162972

Original post by TeeEm

are you looking in AEA 2014 question 4?

The question does not ask you to comment anywhere unless I have a bad copy.

are you perhaps asking me if you have to justify how the 1 disappears?

I am talking about the mark scheme. In the notes they award two S+ marks in parts a and c. So I am wondering what type of comment/dealing with the case would you think would get the mark.

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Reply 591

TeeEm

Original post by physicsmaths

complete solution, properly communicated, without fudges

Reply 592

username1162972

Original post by TeeEm

complete solution, properly communicated, without fudges

ImageUploadedByStudent Room1435181515.593704.jpg

the notes top and bottom lines. What would you say about the r=0 case! So sorry but I feel you have misunderstood my question.

Posted from TSR Mobile

Reply 593

TeeEm

Original post by physicsmaths

the notes top and bottom lines. What would you say about the r=0 case! So sorry but I feel you have misunderstood my question.

Posted from TSR Mobile

At long last I understood

in part a explaining how the 1 disappears into the summation ...
in part c look at my solution pointing at 1/3 claiming that this comes from r=0

if we were to go by the marking scheme I should only get the second one ...
If we go by the general quality of the solution I should get both marks...

Hope this meets with your requirements

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Reply 594

username1162972