Convergence and divergence

So I've been using this handy resource to study for Exam 1/P and so far every question in there has been something that you could work out from the examples section. Am I missing something with these? Thank you in advance for any advice.



http://ift.tt/1z0IN87



Edit: I did not mean to include 28.15



Edit 2: 28.16 seems obvious now



Edit 3: So does 28.17 :/

Convergence and divergence