If \[{{a}_{r}}={{(\cos 2r\pi +i\sin 2r\pi )}^{\frac{1}{9}}},\]then the value of \[\left| \begin{matrix} {{a}_{1}} & {{a}_{2}} & {{a}_{3}} \\ {{a}_{4}} & {{a}_{5}} & {{a}_{6}} \\ {{a}_{7}} & {{a}_{8}} & {{a}_{9}} \\ \end{matrix} \right|\] is

If \[{{a}_{r}}={{(\cos 2r\pi +i\sin 2r\pi )}^{\frac{1}{9}}},\]then the

1.	If \[{{a}_{r}}={{(\cos 2r\pi +i\sin 2r\pi )}^{\frac{1}{9}}},\]then the value of \[\left\| \begin{matrix} {{a}_{1}} & {{a}_{2}} & {{a}_{3}} \\ {{a}_{4}} & {{a}_{5}} & {{a}_{6}} \\ {{a}_{7}} & {{a}_{8}} & {{a}_{9}} \\ \end{matrix} \right\|\] is
A.	\[1\]
B.	\[-1\]
C.	\[0\]
D.	None of these
Answer» D. None of these

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If \[{{a}_{r}}={{(\cos 2r\pi +i\sin 2r\pi )}^{\frac{1}{9}}},\]then the value of \[\left| \begin{matrix} {{a}_{1}} & {{a}_{2}} & {{a}_{3}} \\ {{a}_{4}} & {{a}_{5}} & {{a}_{6}} \\ {{a}_{7}} & {{a}_{8}} & {{a}_{9}} \\ \end{matrix} \right|\] is

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