JEE PYQ: Matrices And Determinants Question 56
Question 56 - 2020 (09 Jan Shift 1)
If the matrices $A = \begin{bmatrix} 1 & 1 & 2 \ 1 & 3 & 4 \ 1 & -1 & 3 \end{bmatrix}$, $B = \text{adj } A$ and $C = 3A$, then $\dfrac{|\text{adj } B|}{|C|}$ is equal to:
(1) $8$
(2) $16$
(3) $72$
(4) $2$