Teaching CSIR NET Mock Test Series Physical Sciences

The function \(f(z)=\frac{1}{(z+1)(z+3)} \) is defined on the complex plane. The coefficient of the (z - z0)2 term of the Laurent series of ƒ(z) about z0 = 1 is

1
\(\frac{7}{64} \)
2
\(\frac{7}{128}\)
3
\(\frac{9}{64}\)
4
\(\frac{9}{128}\)
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