MCQ
ધારોકે $A=\left[\begin{array}{ccc}2 & 1 & 0 \\ 1 & 2 & -1 \\ 0 & -1 & 2\end{array}\right]$.જો $|\operatorname{adj}(\operatorname{adj}(\operatorname{adj} 2 A))|=(16)^{ n }$ હોય,તો $n=.........$
- A$10$
- B$9$
- C$12$
- D$8$
$\therefore|\operatorname{adj}(\operatorname{adj}(\operatorname{adj} 2 A ))|$
$=|2 A |^{( n -1)^3} \Rightarrow|2 A |^8=16^n$
$\Rightarrow\left(2^3|A|\right)^8=16^n$
$\Rightarrow\left(2^3 \times 2^2\right)^8=16^n$
$=2^{40}=16^n$
$=16^{10}=16^n \Rightarrow n=10$
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