Let \[z\] be a complex number, then the equation \[{{z}^{4}}+z+2=0\] cannot have a root, such that

Let \[z\] be a complex number, then the equation \[{{z}^{4}}+z+2=0\] c

1.	Let \[z\] be a complex number, then the equation \[{{z}^{4}}+z+2=0\] cannot have a root, such that
A.	\[\|z\|\,<1\]
B.	\[\|z\|\,=1\]
C.	\[\|z\|\,>1\]
D.	None of these
Answer» B. \[\|z\|\,=1\]

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Let \[z\] be a complex number, then the equation \[{{z}^{4}}+z+2=0\] cannot have a root, such that

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