If \[f(z)=\frac{7-z}{1-{{z}^{2}}},\] where \[z=1+2i,\] then \[|f(z)|\] is equal to:

If \[f(z)=\frac{7-z}{1-{{z}^{2}}},\] where \[z=1+2i,\] then \[|f(z)|\]

1.	If \[f(z)=\frac{7-z}{1-{{z}^{2}}},\] where \[z=1+2i,\] then \[\|f(z)\|\] is equal to:
A.	\[\frac{\|z\|}{2}\]
B.	\[\|z\|\]
C.	\[2\|z\|\]
D.	None of these
Answer» B. \[\|z\|\]

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If \[f(z)=\frac{7-z}{1-{{z}^{2}}},\] where \[z=1+2i,\] then \[|f(z)|\] is equal to:

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