Looking at this question, although there are many similar examples out there. I don't see that questions like this add value here, as they tend to be uninteresting for anybody who doesn't have the same assignment or isn't making the same mistake. These questions often are answerable by some of the engineers here, which helps the OP but then in turn encourages more questions of the same flavor.
Is there a consensus about the acceptability (or lack thereof) of such questions here?
I don't see much of a problem with this kind of questions, apart from that I prefer to see formulas in mathjax rather than photocopy.
The author shows that he has quite a good level of understanding of the topic and tried to solve that problem by himself.
This kind of questions give an opening to explain fundamental theory, and perhaps mix in some practical advice (like this answer from Peter Kämpf). That is valuable to more people than just the OP.
What is not acceptable to me is when people have the audacity to post a photo of their homework question and ask us to write the answer, without showing any effort themselves.
