Exercise 1 Study the convergence of the following series 2 an: _ 7321 _-n+1n . _(1+1/'n)" _- 1 anW,ann r (dependmgonthevaluesofr),an 2n+1 ,asmng,...

Studying convergence of series any help please ? Not sure what tests to use ...

Exercise 1 Study the convergence of the following series 2 an: _ 732—1 _-n+1n . _(1+1/'n)” _- 1an—W,an——n r (dependmgonthevaluesofr),an— 2n+1 ,afl—smng,_n+(—1)“ a _33“n!(-n+1)!(n+3)l a _n(-n+l) a _ (—1)" a”_ n(-n+1)' ”_ (3n)! ' “_ 4“ ' “_n(logn)2' 1 n , 1 (113211111 nan=cosg, an=(—1) 3111;, %=W, an=(—1) (Vfl+l—‘/r_1).