Hi, while reading some artificial intelligence book, i came upon the following sum. How can I evaluate it analytically, so not guess it by computing many terms? It's easy to see by ratio test that it converges (intuitively too, since its a linear vs exponential function).(adsbygoogle = window.adsbygoogle || []).push({});

[itex]\sum_{i=1}^\infty \frac{i}{2^i}[/itex]

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# Series convergence

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