Find the indefinite integral. $$ \int x e^{-x^{2}} d x $$
Added by Rachel L.
Step 1
Notice that the derivative of $-x^2$ is $-2x$, which is similar to the $x$ term in the integrand. So, let's try the substitution $u = -x^2$. Then, $du = -2x dx$. Show more…
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