# Hi every one i need to you

1. Oct 15, 2006

### ريمان

how I can slove this intergation

((e)^-x)\x)

tank you

2. Oct 15, 2006

what have you tried?

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

3. Oct 16, 2006

### ريمان

I tray but I don't get it

tank you

4. Oct 16, 2006

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

5. Oct 17, 2006

### d_leet

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.

6. Oct 17, 2006

just do it multiple times

7. Oct 17, 2006

### d_leet

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..

8. Oct 17, 2006

9. Oct 17, 2006

### ريمان

hi

and whit is the soultions

tank you

10. Oct 20, 2006

### ريمان

hi

is there any body can solve this proplem

11. Oct 26, 2006

### ريمان

hi

waher is smart people in math

any genis here

12. Oct 26, 2006

### 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.

13. Oct 30, 2006

### Pseudo Statistic

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

Last edited: Oct 30, 2006
14. Oct 31, 2006

### ريمان

hi اهلاً

I'm solve this problem befor some days by Series

are you know arabic

15. Oct 31, 2006

### Pseudo Statistic

ا, بس ما بعرف لغة الفصحى