7. Find a function u(x, y) that is harmonic in R2 and that equals f(0) = 4 sin(30) + 5 cos(60) on the unit circle.
7. Find a function u(x, y) that is harmonic in R2 and that equals f(0) = 4 sin(30) + 5 cos(60) on the unit circle.
Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
Problem 1RQ
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Transcribed Image Text:7. Find a function u(x, y) that is harmonic in R2 and that equals f(0) = 4 sin(30) + 5 cos(60) on
the unit circle.
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I don't understand why it is An*r^-n + Bn*r^-n. Why is it r^-n and not r^n? Please let me know. Thank you.
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