I ask the title question, in part because of this assigned exercise posted here and the first commenter to reply. In particular, the first sentence of the comment is fine. The second sentence of the comment, however, tells the asker to ask the question on mathematics.se, instead.
Had the comment included a disclaimer of the sort: "Math questions need to be asked on math.se, but only after first reading math.se's guidelines for asking a question, and improving your question to meet those guidelines," I would not be asking this question here, now.
So I ask this question now:
What are the guidelines on this site instructing users on this site as to whether or not (and when) users here should refer a question, or its asker, to math.se?
Are there any such guidelines? Has this site determined the criteria for appropriate references to math.se? Because I do not think passing off to other SE sites, poor questions which are poor, across the board on SE, is optimal. It merely requires yet another site to waste time and effort to close and/or delete a mess which surfaced on a sister SE site.
I think this discussion would be valuable for both this site's users, and math.se users. I am starting here first, because math.se is overloaded by a daily barrage of questions of the sort that @Jasper attempted to refer to math.se. And so to have users here referring such poor problem statements (you'll see it is not, in fact, a question) to math.se, serves only to burden the few users on math.se who struggle to clean up after such referrals.
I searched meta.matheducators.se for any prior posts about how to deal with questions of the sort I linked to, above, but found nothing. Please educate me as to any previous discussions which might in some way related to my question.
I am as much of a mathematics scholar as I am a mathematics educator. I support this site wholeheartedly. So I'd love to hear others' input regarding my question, or on a potential discussion between math.se and matheducators.se, regarding when to refer and when not to, in either direction. Also, what can math.se do to better steer good questions, not entirely appropriate for math.se, which you'd appreciate having referred to matheducators.se, and to refrain from steering questions that aren't appropriate on math.se nor matheducators.se?