GATE XE (Engineering Sciences) 2007 - Question 3

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Section: Engineering Mathematics | Marks: 1

Let $f(z) = \frac{1}{1 - z^2}$. The coefficient of $\frac{1}{z - 1}$ in the Laurent expansion of $f(z)$ about $z = 1$ is

  • A. -1
  • B. -1/2
  • C. 1/2
  • D. 1

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