most recent 30 from http://mathoverflow.net 2013-06-19T19:14:22Z http://mathoverflow.net/feeds/question/85586 http://www.creativecommons.org/licenses/by-nc/2.5/rdf http://mathoverflow.net/questions/85586/computation-of-simple-math-series thundercats 2012-01-13T15:14:17Z 2012-01-13T15:14:17Z

<p>Hello, does anyone knows how to compute the following "simple" series?</p> <p>sum{i=1..d} (i * b^i)</p> <p>Thanks</p>