How Can Integral Substitutions Simplify \(\int \frac{dx}{x^{2} e^{-2/x}}\)?

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Homework Help Overview

The discussion revolves around the integral \(\int \frac{dx}{x^{2} e^{-2/x}}\), focusing on the use of substitutions to simplify the expression. Participants are exploring methods to approach the integral effectively.

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • Participants discuss potential substitutions, with one suggesting \(u = \frac{2}{x}\) and another finding success with \(u = -\frac{2}{x}\). Questions about the initial approach and reasoning behind the substitutions are also raised.

Discussion Status

The discussion is active, with participants sharing their thoughts on different substitution methods. One participant has successfully simplified the integral using a specific substitution, indicating a productive direction in the conversation.

Contextual Notes

There is an indication of uncertainty regarding the initial approach to the integral, as one participant expresses confusion about where to begin. This suggests that the problem may have complexities that are not fully addressed yet.

Kuno
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Homework Statement


[tex]\int \frac{dx}{x^{2} e^{\frac{-2}{x}}}[/tex]

The Attempt at a Solution


I'm not sure where to begin.
 
Last edited:
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Have you tried any substitutions?
 
What happens if you make a substitution, say: [itex]u = =\frac{2}{x}[/itex] ?
 
I got it with u = -2/x, thanks. I'm not sure why I didn't do that in the first place.
 

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