9000063406

SubArea: 
Infinite series
Level: 
A
Project ID: 
9000063406
Source Problem: 
2010006905
Accepted: 
1
Clonable: 
1
Easy: 
0
Evaluate the following infinite sum. \[ \sum _{n=1}^{\infty }\left (-\frac{1} {2}\right )^{n+2} \]
\(- \frac{1} {12}\)
\(-\frac{1} {8}\)
\(\frac{1} {2}\)
\(1\)