Question
Q.NO.1: Show that the function z=ln(x^2 + y^2)+2tan^-1(y/x) satisfies Laplace’s equation.
(∂^2z/∂x^2)+(∂^2z/∂y^2)=0
(∂^2z/∂x^2)+(∂^2z/∂y^2)=0
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