Posted by <3 on Thursday, February 11, 2010 at 4:15pm.
dx x e^-x^2
well d/dx (e^-x^2) = -2 x e^-x^2
so I will guess
(-1/2) e^-x^2 from 0 to 6
(-1/2) e^-36 - (-1/2)e^0
looks like about 1/2
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