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Express the field D = (x2 + y2) 1(xax + yay ) in cylindrical components and cylindrical variables. (b) Evaluate D at the point where

Express the field D = (x2 + y2)

−1(xax + yay ) in cylindrical components and cylindrical
variables. (b) Evaluate D at the point where ρ = 2, φ = 0.2π, and z = 5, expressing the result
in cylindrical and rectangular components.

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