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Will the real TeeEm please stand up!

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Reply 1360

math42

Original post by Gome44

Sorry about that, but I think the method is quite simple

Let x=0.5tan(u)
Let u=π/4 -z

How'd you come up with the second sub (I tried the initial 0.5tanu)?

Reply 1361

Gome44

Original post by 1 8 13 20 42

How'd you come up with the second sub (I tried the initial 0.5tanu)?

I tried π/2 - z as this sometimes works (I was trying to turn the tan in cot), but the limits changed to much. Thus, I tried π/4 - z to 'preserve' the limits (tbh it was just a lucky guess :smile:

)

(edited 8 years ago)

Reply 1362

TeeEm

Original post by Gome44

Sorry about that, but I think the method is quite simple

Let x=0.5tan(u)
Let u=π/4 -z

that is what I did...
I just could not follow your work (I swear I saw integration by parts there)

Reply 1363

TeeEm

Series Question
Any takers?

Q1.pdf10.1KB

Reply 1364

Krollo

Original post by TeeEm

Series Question
Any takers?

Rather nice question :yep:

Posted from TSR Mobile

(edited 8 years ago)

Reply 1365

TeeEm

Original post by Krollo

Rather nice question :yep:

Posted from TSR Mobile

it was a nice question ... it is no more since you posted the solution

I made this today I was trying to make a question combining series from FP1 and FP2 together.

Reply 1366

Krollo

Original post by TeeEm

it was a nice question ... it is no more since you posted the solution

I made this today I was trying to make a question combining series from FP1 and FP2 together.

Lol I'll spoiler it :tongue:

Posted from TSR Mobile

Reply 1367

TeeEm

Integration Question
Any takers?

Q2.pdf13.5KB

Reply 1368

rcmehta

Original post by TeeEm

Integration Question
Any takers?

Wasn't that a STEP I question?

Reply 1369

TeeEm

Original post by rcmehta

Wasn't that a STEP I question?

I did not know that it was.
Please show me the paper

Reply 1370

rcmehta

Original post by TeeEm

I did not know that it was.
Please show me the paper

1997, Q6

Reply 1371

TeeEm

Original post by rcmehta

1997, Q6

did not know ...

mine came from else where

(edited 8 years ago)

IMG.pdf112.6KB

Reply 1372

math42

Original post by TeeEm

did not know ...

mine came from else where

To be fair the STEP question is too easy really.

Spoiler

Reply 1373

TeeEm

Original post by 1 8 13 20 42

To be fair the STEP question is too easy really.

Spoiler

I did it exactly the same way
Maybe there is some other way, but I have seen the question before and once you have seen it it is very difficult to think of anything else

Reply 1374

TeeEm

Original post by 1 8 13 20 42

To be fair the STEP question is too easy really.

Spoiler

try this one which I have also stolen and changed into my resources ...

this is the original ...

I will pull my hair if somebody says "this question is from so and so ..."

IMG.pdf68.9KB

Reply 1375

math42

Original post by TeeEm

try this one which I have also stolen and changed into my resources ...

this is the original ...

I will pull my hair if somebody says "this question is from so and so ..."

I got -4 which seems suspect
I don't think I am thinking concretely enough (tired, probably not in mental/maths shape in general) for something so involved but it's a very interesting question.

edit: hang on I spotted an error

(edited 8 years ago)

Reply 1376

TeeEm

Original post by 1 8 13 20 42

I got -4 which seems suspect
I don't think I am thinking concretely enough (tired, probably not in mental/maths shape in general) for something so involved but it's a very interesting question.

the answer should be 4
do you want my adapted stolen version solution and then you can try yours

Reply 1377

math42

Original post by TeeEm

the answer should be 4
do you want my adapted stolen version solution and then you can try yours

I made a sign error, I do get 4 now :colondollar:

Reply 1378

TeeEm

Original post by 1 8 13 20 42

I made a sign error, I do get 4 now :colondollar:

all good

Reply 1379

TeeEm

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 (draft)
Paper W (draft)

Note that until I write the solutions mark allocation may change