vector calculus

[meeks_s]

Hey all, I am struggling a bit on parts b and c of this problem. I did the proof fine but I don't know how to approach parts b and c.
Thank you in advance

 

[Deleted member 4993]

Hey all, I am struggling a bit on parts b and c of this problem. I did the proof fine but I don't know how to approach parts b and c.
Thank you in advance

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