The divergence of a vector function A is a scalar function defined by (a) Verify that div
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(a) Verify that div [grad g(x, y, z)] ¡ g = 2g/x2 + 2g/y2 + 2g/z2. This is the origin of the notation 2 for 02/x2 + 2/y2 + 2/z2.
(b) Find r, where r = ix + jy + kz.
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