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Original post by Blutooth
Oh, what was the elegant approach to q7? :smile:


I can't remember.... Someone told me it... I'll try to find out


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Reply 261
Is there a STEP III discussion thread?
Original post by Cayne96
Is there a STEP III discussion thread?

There will be at half 4. No discussion until then.
Reply 263
Original post by Farhan.Hanif93
There will be at half 4. No discussion until then.


I've just created a thread for discussion, waiting for it to be approved :yep:
Original post by cpdavis
I've just created a thread for discussion, waiting for it to be approved :yep:
Done.
Reply 265
half 4 already! totally forgot :biggrin:
Reply 266
Could you post a link to the thread please? :smile:
Reply 268
hey guys! I know this has been asked loads already, but was just wondering what were your (updated! :P) thoughts on the grade boundaries for this paper! (e.g. a 1 haha) THANKS :smile:
Reply 269
Original post by joievee
hey guys! I know this has been asked loads already, but was just wondering what were your (updated! :P) thoughts on the grade boundaries for this paper! (e.g. a 1 haha) THANKS :smile:


I reckon between 65-70 for a 1.
Reply 270
Original post by jack.hadamard

Spoiler



This is further to the discussion on Q8.

Spoiler

(edited 11 years ago)
Original post by Blutooth
Obviously a very hypothetical situation, but do you think if you got 120/120 in paper ii or close to that but then got a 3 in STEP III, they'd still let you in? :smile:


not that hypothetical. Llewellyn got 118/120 on STEP II and a 3 in STEP III and they didnt let him in. Late to the party, but i got you an answer :wink:
Reply 272
There is a very elegant trick to do questions like STEP II, Q8
u(n+1)u(n1)=u(n)2q2,u(n+2)u(n)=u(n+1)2q2u_(n+1)u(n-1)=u_(n)^2-q^2, u_(n+2)u(n)=u_(n+1)^2-q^2, subtract these two terms will lead to the first result.
Start from u(n)(u(n)+u(n+2))=u(n+1)(un1)+u(n+1))u_(n)(u_(n)+u_(n+2))=u_(n+1)(u_n-1)+u_(n+1)), rearrange this, (u(n)+u(n+2))/u(n+1)=(un1)+u(n+1))/u(n)(u_(n)+u_(n+2))/u(n+1)=(u_n-1)+u_(n+1))/u_(n), and this is a good expression, it tells us that it can continue writing this until (u(0)+u(2))/u(1)(u_(0)+u_(2))/u_(1), which will give the result.
Original post by Tomcrease
Question 9

The first show part

Spoiler



The second show part

Spoiler



The third and final part

Spoiler



Any comments or thoughts? Maybe not the shortest route.


this is so smart, im too dumb to combine those two
Original post by jetsandthebennie
this is so smart, im too dumb to combine those two


Because this thread is 9 years old I'm going to close it.
You may wish to double check the date of a post before replying to it. :wink:

:ta:

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