If A is a 3 -rowed square matrix and |A|=4 then

Question:

If $A$ is a 3 -rowed square matrix and $|A|=4$ then $\operatorname{adj}(\operatorname{adj} A)=?$

A. $4 \mathrm{~A}$

B. $16 \mathrm{~A}$

C. $64 \mathrm{~A}$

D. none of these

Solution:

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