17-20. Divergence of radial fields Calculate the divergence of the following radial fields. Express the result in terms of the position vector r and its length r . Check for agreement with Theorem 17.10.\fTHEOREM 17.10 Divergence of Radial Vector Fields For a real number p, the divergence of the radial vector field r F= ( x, y, z ) 3 - P r ( x 2 + 1 2 + 2 2 ) p / 2 is V . F = r P