2. Verify that u = ln(x2+y2) is a solution to the 2 dimensional Laplace
equation
∂2u/∂x2 + ∂2u/∂y2
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Trigonometric Systems and Inner Products and 2-D Laplace Equations are investigated. The solution is detailed and well presented. The response received a rating of "5/5" from the student who originally posted the question.