Question: 200 (a) Let P(z) const be a polynomial. Show that lim P(x) = 0. (b) Find all harmonic polynomials u(x,y) of degree at most 2.

200 (a) Let P(z) const be a polynomial. Show that lim P(x) = 0. (b) Find all harmonic polynomials u(x,y) of degree at most 2. Show that they are all of the form Re P(x + iy) for a polynomial P(z) of degree at most 2. ution
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