For the function f(z)=zi, what is the value of |f( )|+Arg f( – McqOptions

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1.	For the function f(z)=zi, what is the value of &vert;f( )&vert;+Arg f( ), being the cube root of unity with Im( )>0?
A.	e<sup>-2 /3</sup>
B.	e<sup>2 /3</sup>
C.	e<sup>-2 /3</sup>+2 /3
D.	e<sup>-2 /3</sup>-2 /3
Answer» B. e<sup>2 /3</sup>

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