How calcule this integral: x*e^x^2/e^x^2 + 1?

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How calcule this integral: x*e^x^2/e^x^2 + 1

Please help me.
 
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5
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and further? Thank you for your help.
 

Mentallic

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You need to show some effort. What do you do after making a u-substitution?
 
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du= e^x^2 dx normally.
 

Mentallic

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Not quite.

[tex]\frac{d}{dx}e^{f(x)}=f'(x)\cdot e^{f(x)}[/tex]
 
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But after this, whats then. Sorry for my questions.
 

Mentallic

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Well first, apply the rule I just showed you. What does du equal?
 

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