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Divergence and Curl of a Vector Function

Given the vector function

V = {-y/[(x-4)^2+y^2)]^3/2 + (x+4)/[(x+4)^2+y^2)]^3/2}*xhat

+{(x-4)/[(x-4)^2+y^2)]^3/2 + y/[(x+4)^2+y^2)]^3/2}*yhat

a) What is the divergence at (-4,0)

b) What is the curl at (4,0)

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Here is my solution. I derived the all the expressions manually and used Maple only to verify the ...

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PDF and Word documents give explanation of how to find these key values in vector calculus.