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Mathematical Methods: Basics

Quick practice

Question 1 of 5

The Laurent series expansion of the function f(z)=e^{z}+e^{1 / z} about z=0 is given by

A

\sum_{n=-\infty}^{\infty}\frac{z^{n}}{n !}   for all |z|<\infty

B

\sum_{n=-\infty}^{\infty} \frac{z^{n}}{n !}   only if |z|<1

C

\sum_{n=-0}^{\infty} \left(z^{n}+\frac{1}{z^{n}}\right) \frac{1}{n !}   for all  0<|z|<\infty

D

\sum_{n=-0}^{\infty}\left(z^{n}+\frac{1}{z^{n}}\right) \frac{1}{n !}   only if  0<|z|<1

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