Consider the functions f(z) = (z2 + Î±x)/(z + 1)2 and g(z) = sinh(z - Ï€/2

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Consider the functions f(z) = (z2 + Î±x)/(z + 1)2 and g(z) = sinh(z - Ï€/2Î±), Î±â‰ 0The residue of f (z) at its pole is equal to 1. Then the value of Î± is

Options:

A . -1

B . 1

C . 2

D . 3

Answer: Option D

-NA-

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