How do you derive the formula for the volume of a solid of revolution using the method of cylindrical shells versus the disk method?
Answer 1
Heidi Obrien
The disk method involves slicing the solid perpendicular to the axis of revolution and summing the volumes of disks. The volume is given by V = ∫[a to b] π[f(x)]^2 dx. The method of cylindrical shells involves slicing the solid parallel to the axis of revolution, summing the volumes of cylindrical shells. The volume is given by V = ∫[a to b] 2πx[f(x)] dx.
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