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3. For each of the following give at least the first four non zero terms of the Laurent expansion for the stated region (a) e

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Answer #1

Note z = 0 is the only singularity for g(z) = e^z. cosec z

912) cosecz Sinz 25 IN N N N JiN N5 NS Nis ) N N 1 (1-x5-ltetx3 + x3 + + + 2.1 3 + .1 S 1) 2161 It 2 t + 25 I IZ + ZA SI 34 +363) Sinz cosa 23 + 25 - f(2)= D f(2= oo Sinz Cose B Höde that z o is the lonly fingularity and 220 is the removable singel N

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