Question

If $A = \left| \begin{array}{ccc} -a & 1 & 1\\ 1 & -a & 1 \\ 1&1&-a \end{array}\right|$ and $B = \left| \begin{array}{cc} a & 1 \\ 1&a \end{array} \right|$, then $\dfrac{dA}{da}$ is: 

(a) 1 + 3B
(b) 3B
(c) -3B
(d)1 - 3B​

$\Large\twoheadrightarrow$ Complete explanation
$\Large\twoheadrightarrow$ Brainly genius ​

Answer 1

The Correct Answer is Option c ) - 3B

For Explanation See the attachment (:

Note :- If you are not satisfied with the answer , then report it (: