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If f(z) = (7 - z)/(1 - z^2) where z = 1 + 2i, then |f(z)| is

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If f(z) = (7 - z)/(1 - z2) where z = 1 + 2i, then |f(z)| is

A. |z|/2
B. |z|
C. 2|z|
D. none of these

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A. = |z|/2

= |z|/2

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