題組內容
Correctly number each of your answers to indicate which question is answered.
(I) Let u = u(r, y) be a function of t, y. Express 
in terms of polar coordinates r,θ together with 
Answer: __(10)__
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Correctly number each of your answers to indicate which question is answered.
(I) Let u = u(r, y) be a function of t, y. Express in terms of polar coordinates r,θ together with Answer: __(10)__