Hi everyone,

I have the Series (-4) ^ K / K^2 and have to find if its absolutely convergent, conditionally convergent or divergent. I know the the generic form of alternating series is (-1)^k or (-1)^ k+1 so i wasnt sure how to go about this one. Also the Series cos(pie)k / k..Since its bounded between -1 and 1 can i just make l Uk l =1/k...?

Thanks for your time and help!