Problem 1093 (difficulty: 4/10)

\(\displaystyle 1-{1\over 2}+{1\over 3}-{1\over 4}+{1\over 5}-{1\over 6}+{1\over 7}-{1\over 8}+\ldots=?\)

Give me another random problem!

Subject, section:
Requested difficulty:
Request for a concrete problem:I want problem no.

Supported by the Higher Education Restructuring Fund allocated to ELTE by the Hungarian Government