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## Homework Statement

i have the divergence in the (x,y,z) Cartesian as [tex]\frac{dA_x}{dx}+\frac{dA_y}{dy}+\frac{dA_z}{dz} [/tex]

and the assignment is to transfer it to cylindrical system [tex](r,{\phi},z)[/tex], by any way i choose.

## Homework Equations

tried with the chain rule, but i am doing something wrong, though

i get the gradient in the cylindrical system