題目:An orthogonal (u.v.z)coordinate system is defined by the following
set of equations that these cooordinates to a "standard" Cartesian set:
u = x/(x^2 + y^2)
v = -y/(x^2 + y^2)
z = z
sktch the lines of constant u and constant v in the xy-plane
想請問各位要如何解題，如何做圖，謝謝各位。
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