Laplace equation is called a harmonic function. Let the functions u = u(x, y) and v = v(x, y) be of class C² and satisfy the Cauchy–Riemann equations ди dv and dv du ду Show that u and v are both harmonic.

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A: Given, u·u=4, u·v=-5, v·v=10

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A: Cauchy Riemann method in polar form

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