Calculus (3rd Edition)

Published by W. H. Freeman
ISBN 10: 1464125260
ISBN 13: 978-1-46412-526-3

Chapter 11 - Infinite Series - 11.2 Summing and Infinite Series - Exercises - Page 547: 17

Answer

Diverges.

Work Step by Step

Given $$\sum_{n=1}^{\infty} \frac{n}{10 n+12}$$ Since \begin{align*} \lim _{n \rightarrow \infty} \frac{n}{10 n+12}&=\lim _{n \rightarrow \infty}\left(\frac{1}{10+\frac{12}{n}}\right)\\ &=\frac{1}{10} \neq 0 \end{align*} Since the $n$th term $a_{n}$ does not converge to zero, thus the series diverges.
Update this answer!

You can help us out by revising, improving and updating this answer.

Update this answer

After 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.