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L'Hopital's rule

Please show or explain step by step process. Please use proper notation.
Volume: Find the volume of the solid generated by revolving the region bounded by the graph y=xe^(-x), y=0 and x=0 about the x-axis.

Solution Preview

radius of the curve at x,
r(x) = xe^(-x)

Therefore, volume of strip ...

Solution Summary

This shows how to find a solid of revolution.

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