- #1
Dixanadu
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Homework Statement
Expand [itex]f(z)=\frac{1}{z-4}[/itex] in a laurent series valid for (a) [itex]|z|<4[/itex] and (b) [itex]|z|>4[/itex]
Homework Equations
The formula for laurent expansion...
[itex]\sum_{n=-∞}^{+∞}a_{n}(z-z_{0})^{n}[/itex]
where
[itex]a_{n}=\frac{1}{2\pi i}\oint_c \frac{f(z)}{(z-z_{0})^{n+1}}dz[/itex]
The Attempt at a Solution
umm...I have no idea..help please T_T