Hi! Looking to find

n∑k=1 8(k/n)

(n is supposed to be on top, k=1 below the sigma sign)in closed form.

I've tried doing 8*[(n(n+1)/2)/n], and that didn't seem to work. I'm not sure if I'm supposed to do anything with the n or if it might be an issue with what to do with the division of k/n. Thanks!

1 answer

I got it!

n is a constant, so it's just 8/n * n(n+1)/2.