Answer
-0.688172
Work Step by Step
We evaluate using a calculator:
$\sum_{n=1}^{100}\frac{(-1)^n}{n}=\frac{(-1)^1}{1}+\frac{(-1)^2}{2}+...+\frac{(-1)^{100}}{100}=-0.688172$
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.