Answer
$S_6=0$
Work Step by Step
$a_1=-5$ and $a_n=a_6=5$
$S_n=\frac{n}{2}(a_1+a_n)$
$S_6=\frac{6}{2}(-5+5)=\frac{5}{2}(0)=0$
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.