25. u = x^2 + yz, x = pr cos(theta), y = pr sin(theta), z = p + r; Du/Dp, Du/Dr, Du/D(theta) when p = 2, r = 3, theta = 0 Du/Dp etc. are the partial derivatives. Thanks.
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I believe: The same process is true for the other partial derivatives.
Originally Posted by sixstringartist I believe: The same process is true for the other partial derivatives. you are correct. by the chain rule: for replace p with r in the formula above for replace p with in the formula above
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