Divergence of unit vector r(hat)?
(r, i, j, and k are vectors)
Evaluate Del ( r/ |r| )
The answer should be 2/r but I cannot get it.
Any help is appreciated!
Since ( r / |r| ) is the unit vector r(hat), x, y, and j would each equal 1.
So r(hat) = i+j+k
When I take partial derivatives with respect to x, y, and z respectively, I should get 0 for everything. But the answer is 2 / r.