Question

Asked Apr 30, 2019

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Z is a complex variable

z=x+iy

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Step 1

We know some general Laurant series expansion of e^{x},cosx,coshx as following :

Step 2

(a)The laurant series expression for first the expression at z=0 shown below:

and the Laurant series expansion is removable singularity.

Step 3

(b)The laurant series expression for first the expression at z=0 shown b...

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