Find the range of the function defined by f(z)=Re[2iz/(1-z2)]. – McqOptions

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1.	Find the range of the function defined by f(z)=Re[2iz/(1-z2)].
A.	(−∞, 0) &Union; (0, ∞)
B.	[2, ∞)
C.	(−∞, −1] &Union; [1, ∞)
D.	(−∞, 0] &Union; [2, ∞)
Answer» D. (−∞, 0] &Union; [2, ∞)

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