Singular radial field Consider the radial field
a. Evaluate a surface
b. Note that the first partial derivatives of the components of F are undefined at the origin, so the Divergence Theorem does not apply directly. Nevertheless, the flux across the sphere as computed in part (a) is finite. Evaluate the triple integral of the Divergence Theorem as an improper integral as follows. Integrate div F over the region between two spheres of radius a and 0 < g < a. Then let g →0+ to obtain the flux computed in part (a).
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Calculus: Early Transcendentals (3rd Edition)
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