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Show the partial derivative

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Reference no: EM131633199

Show that:

∂2z/∂s2 + ∂2z/∂t2 = (x2+y2)(∂2z/∂x2 + ∂2z/∂y2)

x = es cost, y = es sint, and z = u(x, y) = v (s, t)

Reference no: EM131633199

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