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Question: Two Ei question how to turn into series Ei(1, -ln(a-2)) and how to calculate Ei(1,1.).

Question:Two Ei question how to turn into series Ei(1, -ln(a-2)) and how to calculate Ei(1,1.).

one pound 25 Maple
integral
June 09 2018
1

1) I do not understand,

Ei(1, -ln(a-2)) for real numbers > +2

how to I convert it into this series format are there are 2 parameters ? (from https://en.wikipedia.org/wiki/Exponential_integral)

I'm aware of https://www.maplesoft.com/support/help/Maple/view.aspx?path=Ei&term=Ei

but as you can deduce I'm still having difficulties. 

2) Also In mary boas's book she only deals with Ei(x) no where can I figure out how 0.2193839344 is calculated from Ei(1,1.)?

Ei(1,1.)

0.2193839344

 
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