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# Random Walks watch

1. https://www.maths.ox.ac.uk/system/fi...PaperC2011.pdf

7.a)ii)

I end up with the relationship t_i=qt_i-1+pt_i+1 and using the conditions t_0=t_n=0 I just get t_i=0 which is clearly wrong.
2. (Original post by james22)
https://www.maths.ox.ac.uk/system/fi...PaperC2011.pdf 7.a)ii) I end up with the relationship t_i=qt_i-1+pt_i+1 and using the conditions t_0=t_n=0 I just get t_i=0 which is clearly wrong.
It's not entirely clear to me what your relationship is from how you've written it, but I going to assume that you've got ti=qti-1+pti+1

This is very close, but it's missing something. Say n=2. Why doesn't your relationship work for t1?

Edit: Part (b) is quite neat.

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