Thanks! Oh and if u dont mind me asking, did u have to simply the expression in n for the method of differences or could u just leave it the way you got it?
Thanks! Oh and if u dont mind me asking, did u have to simply the expression in n for the method of differences or could u just leave it the way you got it?
Specifically asked for it as a single fraction, would cost you an answer mark I assume
I suspect it will be somewhere around there. Almost everyone I talked to (me included!) has made at least one mistake so I think 72/72 will be rare for this paper.