Thread: Sigma Notation Closed and Open Forms

k=1
ending value of k=n-1
eqn= k^3/n^2

How do you deal with the (n-1) ending value when you are writing the sum in closed form?

Originally Posted by thinair

k=1
ending value of k=n-1
eqn= k^3/n^2

How do you deal with the (n-1) ending value when you are writing the sum in closed form?

You should know that .

Therefore .

Thank you, that is much simpler than what I was trying.