Will the real TeeEm please stand up!

Original post by TeeEm

39 days to A level results

Question for Sunday 05/07/15
AS Level Maths upwards

Here is my solution. Take n=1 and it shud give 2/3 but your formula gives 1/3. All you are missing is that 2^n+1 should be 2^2n+1. And then you answer simplifies to my one!
ImageUploadedByStudent Room1436090242.733018.jpg

ImageUploadedByStudent Room1436090242.733018.jpg

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Reply 622

Original post by rayquaza17

I think this is right.

\displaystyle \frac{2^{n+1}n!(n+1)!}{(2n+2)!}=\frac{2\cdot 2^n n!(n+1)n!}{(2n+2)(2n+1)!}=\frac{2^n n! n!}{(2n+1)!}=\frac{2^n(n!)^2}{(2n+1)!}

Yh thats it. I just cant do latex as it wouldve been clearer.

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Reply 623

OP

Original post by physicsmaths

Yh thats it. I just cant do latex as it wouldve been clearer.

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maybe there is a typo in my answer. This is my answer also

Reply 624

Original post by TeeEm

maybe there is a typo in my answer. This is my answer also

But do you agree now that your answer simplifies to my one roght?

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Reply 625

Original post by TeeEm

maybe there is a typo in my answer. This is my answer also

Also you should steal this ImageUploadedByStudent Room1436091498.982642.jpg

IIT JEE question. Very weird and neat answer.

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Reply 626

OP

Original post by physicsmaths

But do you agree now that your answer simplifies to my one roght?

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definitely
I could not understand what you were saying last night without latex.
(I refuse to use latex too)

Reply 627

OP

Original post by physicsmaths

Also you should steal this ImageUploadedByStudent Room1436091498.982642.jpg

IIT JEE question. Very weird and neat answer.

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probably I have it somewhere already.
by the way the recurrence relation is an old question of mine from my proof by induction sheet and not stolen

Reply 628

Original post by TeeEm

probably I have it somewhere already.
by the way the recurrence relation is an old question of mine from my proof by induction sheet and not stolen

Oh no i wasnt implying you stole that just you always say 'i shall steal this' so thought this question was nice.
There are so many questions like that or sinilar that onvolve the even and odd terms like that.

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Reply 629

OP

Original post by rayquaza17

I think this is right.

\displaystyle \frac{2^{n+1}n!(n+1)!}{(2n+2)!}=\frac{2\cdot 2^n n!(n+1)n!}{(2n+2)(2n+1)!}=\frac{2^n n! n!}{(2n+1)!}=\frac{2^n(n!)^2}{(2n+1)!}

Original post by physicsmaths

Here is my solution. Take n=1 and it shud give 2/3 but your formula gives 1/3. All you are missing is that 2^n+1 should be 2^2n+1. And then you answer simplifies to my one!
ImageUploadedByStudent Room1436090242.733018.jpg

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the answer is all wrong as I copied and pasted and have not changed the answer...
I rewrote the question today after I did the solution and did it as a show.

Reply 630

Original post by TeeEm

the answer is all wrong as I copied and pasted and have not changed the answer...
I rewrote the question today after I did the solution and did it as a show.

My fonal answer is wrong?????

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Reply 631

OP

Original post by physicsmaths

My fonal answer is wrong?????

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mine was wrong because I have 2 very similar questions to the one I posted.
I decided to make a new one, copied and pasted, and forgot to change the answer in the box. I just put the solution up to check yours.

Reply 632

OP

Q7, Monday 06-07-15.pdf9.6KB

38 days to A level results

Question for Monday 06/07/15
AS Level Maths upwards

(edited 8 years ago)

Q7, Monday 06-07-15, solution.pdf54.1KB

Reply 633

rayquaza17

17

Original post by TeeEm

the answer is all wrong as I copied and pasted and have not changed the answer...
I rewrote the question today after I did the solution and did it as a show.

I never worked through the question, I was just checking if your two answers were the same. :redface:

Reply 634

OP

Q8, Tuesday 07-07-15.pdf15.0KB

37 days to A level results

Question for Tuesday 07/07/15
A Level Maths upwards

(edited 8 years ago)

Q8, Tuesday 07-07-15, solution.pdf93.3KB

Reply 635

Original post by TeeEm

37 days to A level results

Question for Tuesday 07/07/15
AS Level Maths upwards

This mustve been stolen from aea paper 14....

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Reply 636

OP

Original post by physicsmaths

This mustve been stolen from aea paper 14....

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Nope,
stolen may be but these are standard parametric loci of evolutes, involutes, epicycloids etc which I have tons of examples!

Reply 637

Original post by TeeEm

Nope,
stolen may be but these are standard parametric loci of evolutes, involutes, epicycloids etc which I have tons of examples!

Ah i see. I had only seen it first time in aea you see.

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Reply 638

OP

Original post by physicsmaths

Ah i see. I had only seen it first time in aea you see.

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look at IYGB, C4,

Paper T, Q6
Paper S, Q9

very easy to make for a question maker of my calibre ....

Reply 639

a10