# Detailed Explanation to Partial Derivatives

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Please see the attached file for the full problem description.

1. (a) If f (r, theta) = r^n cosntheta show that (see attached file)

(b) If u = y^3 - 3x^2y prove that (see attached file).

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##### Solution Summary

A partial derivative problem is solved. The solution is detailed and well presented.

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