10.8.13 Series with Complex Terms
Condition: Find all the Lauren decays of this function according to the degrees \ (\ left (z-z_ {0} \ right) \): \ [\ frac {2 z-and} {(z+i) (z-2 i)}, \ quad z_ {0} =-i \ text {. } \]
Expansion of Complex Functions in Laurent and Taylor Series. Both Single-Valood and Multi-Valood Function are Consedered, Indicating the Branches Along Which-Valved Functions are Taken.