2 Show that the following functions are harmonic in x and y a- e*cosy b- x- 3xy2 c- log x + y2

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
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Chapter2: Second-order Linear Odes
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2 Show that the following functions are harmonic in x and y :
a- e cosy
b- x - 3xy2
c- log x? + y2
Transcribed Image Text:2 Show that the following functions are harmonic in x and y : a- e cosy b- x - 3xy2 c- log x? + y2
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