Answer to Question #88320 in Differential Equations for Rwittik

Question #88320

If f and g are arbitrary functions of their respective arguments, show that u=f(x-vt+iay)+g(x-vt+iay) is a solution of d2u/dx2+d2u/dy2=1/c^2 .d2u/dt2,where a^2=1-(v^2/c^2)

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