48 views

The residues of a function $$f(z)=\frac1{(z-4)(z+1)^3 }$$
are

1. $\frac{-1}{27}$  and  $\frac{-1}{125} \\$
2. $\frac{1}{125}$ and $\frac{-1}{125} \\$
3. $\frac{-1}{27}$  and $\frac{1}{5} \\$
4. $\frac{1}{125}$and $\frac{-1}{5}$