If A= [ ll 4 & 2 5 & 3 ], then |adj(adj A)|= - Vidyadip

MCQ

If $A=\left[\begin{array}{ll}4 & 2 \\ 5 & 3\end{array}\right]$, then $|\operatorname{adj}(\operatorname{adj} A)|=$

A
1
✓
2
C
3
D
4

✓

Answer

Correct option: B.

2

(B) Using Shortcut 4(xiv),
$|\operatorname{adj}(\operatorname{adj} A )|=| A |^{(2-1)^2}$
$=| A |=12-10=2$

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "MCQ" from Matrics→Matrics — all question types→Maths STD 12 Science question papers→Maharashtra Board STD 12 Science question papers→Maharashtra Board question paper generator→

Similar questions

If $\vec{a}+\vec{b}, \vec{b}+\vec{c}$ and $\vec{c}+\vec{a}$ are coterminous edges of a parallelepiped, then its volume is

$\int_a^b \frac{\log x}{x} d x=$

Three integers are chosen at random from the first $20$ integers. The probability that their product is even is,

The area of the region included between the line $x+y=1$ and the circle $x^2+y^2=1$ is

The differential coefficient of $\text{f}(\log\text{x})$ w.r.t. $x$, where $\text{f(x)}=\log\text{x}$ is:

The co-ordinates of a point P are $(3,12,4)$ with respect to origin O , then the direction cosines of OP are

Principal solutions of the equation $\sin 2 x+\cos 2 x=0$, where pi < x < 2pi" are "

If $A=\left[\begin{array}{lll}1 & 2 & 3 \\ 0 & 4 & 2 \\ 0 & 0 & 6\end{array}\right]$, then the minor of the element $a_{31}$ is

Let $\text{f(x)}=\begin{cases}1, & \text{x}\leq-1\\|\text{x}|, & -1 <\text{x} <1\\0,&\text{x}\geq1\end{cases}$ then, $f$ is:

The equation of the plane passing through $(\alpha, \beta, \gamma)$ and parallel to $a x+b y+c z=0$ is