if u=x²-2xy+ay² is harmonic find the value of 'a'.?
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- Hence if a question given here was worth 10 marks ... (b) g = u+iv with u = y3 -3x2y+2xy+ 2x2 -2y2 and v = x3 -3xy2 +4xy-x2 +y2. ... any of these values of y and thus f3 is not analytic.
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