You won't get a closed form for it.
All you can do is giving the expression with an integral symbol.
What was precisely the question ?
Quote (FamilyGuyViewer @ Nov 13 2016 05:30pm)
wtf is a exponential integral.. E1(u)... never seen in school
That's an anti-derivative of the function : t -> e^(t) / t
This post was edited by feanur on Nov 13 2016 10:33am