Hi. I'm having some trouble solving the following gamma function:(adsbygoogle = window.adsbygoogle || []).push({});

Evaluate the integral e^(4u) * e^(-e^u)du. The upper limit is inifinity and the lower limit is 0.

I'm letting x = e^(u) or u = 1 in the hope to have the function looking similar to the gamma function. But i'm having no luck as du/dx will be equal to zero in this case.

Help please! :)

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# Gamma function

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