How Can I Solve the Integration of (e^-x)/x Using Series?

[ريمان]

how I can slove this intergation

((e)^-x)\x)

tank you

 

[courtrigrad]

what have you tried?

$$\int \frac{e^{-x}}{x}$$? use integration by parts.

 

[ريمان]

tank you master courtrigad

I tray but I don't get it

tank you

 

[courtrigrad]

Let $$u = e^{-x}$$ and $$dv = \frac{1}{x}$$

 

[d_leet]

Let $$u = e^{-x}$$ and $$dv = \frac{1}{x}$$

That won't get you very far in evaluating the integral, I don't think parts will at all, I think I remember a post from a while ago that this can't be integrated in terms of elementary functions.

 

[courtrigrad]

just do it multiple times

 

[d_leet]

just do it multiple times

And it still won't work very well, if you let dv=1/x then you get a natural log that will make things messy, and if you let u=1/x then you'll just get e^-x/x², e^-x/x³ etc..

 

[DeadWolfe]

http://en.wikipedia.org/wiki/Exponential_integral

 

[ريمان]

hi

and whit is the soultions

tank you

 

[ريمان]

hi

is there anybody can solve this proplem

 

[ريمان]

hi

waher is smart people in math

any genis here

 

[tandoorichicken]

Just for your reference, ريمان, the people who help out here aren't here to do the problem for you or give you the answer outright. We'll just point you in the right direction/ correct what you did wrong and give you a boost. Please respect that.

 

[Pseudo Statistic]

how I can slove this intergation

((e)^-x)\x)

tank you

قبل ما تسءل٬ جرب ال سؤ ال
هذا السؤال لا تقدر أن تكمله

I think that was a little clearer.. :P My written Arabic's a little rusty though.

Taylor Series Solution بس تقدر تعمل

 

[ريمان]

hi اهلاً

I'm solve this problem befor some days by Series

are you know arabic

 

[Pseudo Statistic]

hi اهلاً

I'm solve this problem befor some days by Series

are you know arabic

ا, بس ما بعرف لغة الفصحى