Unfortunately the lecturer owes us about 3 sets of coursework, and that induction one was the last of them. I doubt we'll ever get it back now, since it's a reading week and then 2 weeks of exams; lectures are over for this semester. Maybe next semester we'll get it back, but I doubt it. I meant to go and speak to the lecturer and see if my proof was correct, but there were always other things to do... like go down the pub, play pool, stay in bed, etc

Did you see the proof I posted? What did you think?