For z €C\ {0} let f(z) = e2/(z-1) sin z z4 1 73 Then, 5704 O f(z) has a simple pole in z = 0 O Res, (1) = 1 f(z)dz = |z%3D2 !l = zp(z)J O f(z)has an essential singularity in z = 0 76

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
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For z € C\ {0} let
f(z) = e2/(x-1)
1
0415
z3
sin z
z4
mot
Then,
o f(z)has a simple pole in z= 0
o Res,(1) = 1
f(z)dz = 4m i
zl=2
O f(z)has an essential singularity in z = 0
Transcribed Image Text:For z € C\ {0} let f(z) = e2/(x-1) 1 0415 z3 sin z z4 mot Then, o f(z)has a simple pole in z= 0 o Res,(1) = 1 f(z)dz = 4m i zl=2 O f(z)has an essential singularity in z = 0
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