If A= [ ll 4 & 2 3 & 4 ], then |adj A| is equal to - Vidyadip

MCQ

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

A
16
✓
10
C
6
D
8

✓

Answer

Correct option: B.

10

(B) A is a $2 \times 2$ matrix.
$\therefore|\operatorname{adj} A |=| A |=10$
...[Using Shortcut 4(ix)]

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

For the curve $\sqrt{\text{x}}+\sqrt{\text{y}}=1,\frac{\text{dy}}{\text{dx}}$ at $\Big(\frac{1}{4},\frac{1}{4}\Big)$ is:

Which of the following is a statement in logic?

The point at the curve $y = 12x - x^2$ where the slope of the tangent is zero will be:

In $\triangle A B C$, if $\cos A=\frac{\sin B}{2 \sin C}$, then $\triangle A B C$ is

If $g$ is the inverse of function $f$ and $f^{\prime}(x)=\frac{1}{1+x^7}$, then the value of $g^{\prime}(x)$ is equal to:

For a binomial distribution, n = 5. If P(X = 4) = P(X = 3) then p = ___________

If y is a function of x and log(x + y) = 2xy, then the value of y'(0) = _______

If $\cos ^{-1} \frac{3}{5}-\sin ^{-1} \frac{4}{5}=\cos ^{-1} x$, then $x=$

Let $f: R \rightarrow R$ be a function such that $f(x)=x^3+x^2 f^{\prime}(1)+x f^{\prime \prime}(2)+6, x \in R$, then $f(2)$ equals

A vector perpendicular to $2 \hat{i}+\hat{j}+\hat{k}$ and coplanar with $\hat{i}+2 \hat{j}+\hat{k}$ and $\hat{i}+\hat{j}+2 \hat{k}$ is