Answer
36
Work Step by Step
Finding the sum using the properties of sequences, we find:
$$1+\sum _{k=1}^52k+1 \\ 1+35 \\ 36$$
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.