(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

I want to show that:

Grad dot product with r = 2/r

where:

r is the unit vectorr/r

r= xi+ yj+ zk

r is magnitude ofr

3. The attempt at a solution

I think the answer should be 3/r

since unit vector r =r/r,

r = (x/r)i+ (y/r)j+ (z/r)k

then when I do grad dot r I should get (1/r) + (1/r) + (1/r) = (3/r)

what do you think?

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# Homework Help: Divergence theorem/vector calculus

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