Question

Does cos n/n^2 converge?

Answer 1

since cosn/n^2 <= 1/n^2
and 1/n^2 converge
we can say it converge.

Answer 2

i thought so as well but wolfram alpha seems to say it's divergent

Answer 3

http://www.wolframalpha.com/input/?i=Does++cos+n%2Fn%5E2+converge%3F&dataset=

Answer 4

you talk about the sum of cosn/n^2 ?

Answer 5

and the question is cos(n) / (n^2) ?

Answer 6

http://www.wolframalpha.com/input/?i=Does++cos%28n%29%2Fn%5E2+converge%3F

Answer 7

Oh right lol.

Answer 8

Thanks guys, makes sense now