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(x)/(e^(x^(2)))...

`(x)/(e^(x^(2)))`

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` int (x)/(e^(x^(2)))dx " " underset(rArr - 2x =dt)(" Let " -x^(2) =t)`
`= int x. e^(-x^(2)) dx= int e^(t). (dt)/(-2) " " rArr x dx = (dt)/(-2)`
`=-(1)/(2) e^(t) +c= -(1)/(2) e^(-x^(2)) +c`
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