# Math Help - sum of |(cos(n^10-16n^2))/n|

1. ## sum of |(cos(n^10-16n^2))/n|

so i want to show that sum |(cos(n^10-16n^2))/n| from n=1 to n=infinity where n is a member of the natural numbers diverges, so if i show that the sequence of partial sums is unbounded then this is equivalent right? i was wondering if this is the right approach to take? (i would like to figure this out so i just want a little help not the full proof or anything thanks)

2. It seems you forgot to mention what you are trying to show the sum is equivalent to.

3. oh yeah sorry i want to show that the sum is divergent