Another update for the seminar problems

(English from now on.)
Concerning the 5150 problem, I had to update the text again. Stability of 2nd-order equations will require Monday's lecture, and maybe we should not focus on the case that is stable but not asymptotically so. 
As pointed out in the now-deleted message in Norwegian: You shall not deduce the equation nor worry where it emerges from (though, take note that 0<p<1), and you shall not deduce K; just take it to be a constant. Also, for a particular solution when p=1/2: see the hint.

- Nils