If \[\left| \begin{matrix} {{x}^{n}} & {{x}^{n+2}} & {{x}^{2n}} \\ 1 & {{x}^{a}} & a \\ {{x}^{n+5}} & {{x}^{a+6}} & {{x}^{2n+5}} \\ \end{matrix} \right|=0\,\forall \,x\,\in R,\] where \[n\in N\] then value of 'a' is

If \[\left| \begin{matrix} {{x}^{n}} & {{x}^{n+2}} & {{x}^{2n}}

1.	If \[\left\| \begin{matrix} {{x}^{n}} & {{x}^{n+2}} & {{x}^{2n}} \\ 1 & {{x}^{a}} & a \\ {{x}^{n+5}} & {{x}^{a+6}} & {{x}^{2n+5}} \\ \end{matrix} \right\|=0\,\forall \,x\,\in R,\] where \[n\in N\] then value of 'a' is
A.	\[n\]
B.	\[n-1\]
C.	\[n+1\]
D.	None of these
Answer» D. None of these

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If \[\left| \begin{matrix} {{x}^{n}} & {{x}^{n+2}} & {{x}^{2n}} \\ 1 & {{x}^{a}} & a \\ {{x}^{n+5}} & {{x}^{a+6}} & {{x}^{2n+5}} \\ \end{matrix} \right|=0\,\forall \,x\,\in R,\] where \[n\in N\] then value of 'a' is

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