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<math>\sum_{n = M}^N \alpha^n = \alpha^M - \alpha^{N-1} / (1 - \alpha)</math> | <math>\sum_{n = M}^N \alpha^n = \alpha^M - \alpha^{N-1} / (1 - \alpha)</math> | ||
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| + | *What if <math>\alpha=1</math>???? | ||
Revision as of 05:45, 20 July 2009
$ \sum_{n = M}^N \alpha^n = \alpha^M - \alpha^{N-1} / (1 - \alpha) $
- What if $ \alpha=1 $????
