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help me on this integral

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pmonon

pmonon

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I am in trouble with this definite integral:

∫ x * exp(-((2*x)^-2)) dx from -≈ to ≈

Anyone, please?
 

u sub
u=x^2

remember you can write it as x*exp[1/(4x^2)]

Edit: Umm, nevermind you cant integrate e^(1/u)

Added after 18 minutes:

my calculator says its impossible :p
 

It is a problem here to type in the expressions, let me try again: I need to calculate this definite integral

∫ x*exp{-1/(2*x2)} dx from -infinity to infinity...
 

Result= 0
(odd function and symetrical integration range from -a to +a)
 

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