I need help differentiating this function. f(x)=xe^(-x^2/8) I got this far: f'(x)=x(d/dx)e^(-x^2/8)*e^(-x^2/8)(d/dx)x
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you will have e^-x^2/8 - (2/8)x^(-6/8)*xe^(-x^2/8)
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