Question

What is the 5th partial sum of sum of -2+5n infinity

Answer 1

\[\sum_{n=1}^{\infty} -2+5n\]

Answer 2

will be

-2+5*1 +(-2)+5*2 +(-2)+5*3 ...
so because there have wrote partial sum i think that will be

-2+5*5=-2+25 =23

Answer 3

Thank you