Question

What is the 5th partial sum of ( see sigma notation below) ?

Answer 1

\[\sum_{n=1}^{\infty} -4+5n\]

Answer 2

I'd think you'd just have to add them up :)

Answer 3

-4+5(1)+
-4+5(2)+
-4+5(3)+
-4+5(4)+
-4+5(5)