Question

Obtain the Laurent series of:
\[ f(z) = { z^4 \over 1 + z}, \text{ about z=0 and |z| > 1} \]

Answer 1

Hint :
\[f(z) = { z^4 \over 1 + z}=\frac{z^3}{1+\frac{1}{z}}\]\[|\frac{1}{z}|<1\]

Answer 2

thanks man!!

Answer 3

yw :)