z=x^2*arctan(2y/x)求dz

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z=x^2*arctan(2y/x)求dz

z=x^2*arctan(2y/x)求dz
z=x^2*arctan(2y/x)求dz

z=x^2*arctan(2y/x)求dz
dz=2xarctan(2y/x)+x^2(1+(1+4y^2/x^2)^0.5)(2dy/x-2ydx/x^2)
本人水平有限,见谅