I need to evaluate this integral(adsbygoogle = window.adsbygoogle || []).push({});

[itex]\int_{x_0}^{\infty} \frac{\exp(-x)}{x}\, dx[/itex]

for

[itex]x_0 \ll 1[/itex]

Is there any cute approximate analytical expression? All I get are diverging series all over the place. The function is obviously finite...

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# Approximate integral for exp(-x)/x

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