I just got this as an audit in the close vote queue and voted it for closure because of 'Missing context or other details'. To me this looks like one of these common homework questions that lack significant effort, but obviously I am wrong on this one, also judging by the upvotes. Not trying to point fingers at anyone, just genuinely curious as I really can't tell the difference here. So I guess my question is: What differs this question from the low effort questions we get dozens of every day?
I post @Accelerator's comment as an answer in order to get the question off the queue:
I think it's because people think higher level questions should be given some slack in terms of how much effort/context/background needs to be shown. Partially because such askers already know the basics and self-study/research more than some college undergraduates who find shortcuts by expecting us to do their homework for them. I've also noticed, especially in posts about proving inequalities and evaluating series and integrals, that people tend to overlook some rules needed to determine what constitutes a good post or not.