If A=bmatrix 2 & 1 \\ 7 & 5 bmatrix, then the value of |A(adj A)| is Option 1: 3 Option 2: 9 Option 3: 27 Option 4: 81

The answer is '9'. View full solution:

CUET Mathematics - If A=bmatrix 2 & 1 \\ 7 & 5 bmatrix, then the value of |A(adj A)| is | PYQs + Solutions

CUET Mathematics 2026 18th May Shift 2

Algebra

Easy

applied

✅ Correct Option: 2

Related questions:

18th May Shift 1

If the matrix $A = \begin{bmatrix}a & 3 & b\\ c & 0 & -1\\ -2 & 1 & 0\end{bmatrix}$ is skew-symmetric, then $4a+3b+2c$ is equal to

29th May Shift 2

Match the LIST-I with LIST-II

LIST-I	LIST-II
A. $\begin{vmatrix} x+2 & 3 \\ x+5 & 4 \end{vmatrix} = 3$	I. $x = 10$
B. $\begin{vmatrix} x+2 & x+5 \\ 3 & 4 \end{vmatrix} = 13$	II. $x = 60$
C. $\begin{vmatrix} x+4 & x-4 \\ 8 & 7 \end{vmatrix} = 0$	III. $x = 0$
D. $\begin{vmatrix} x+4 & 8 \\ x-4 & 7 \end{vmatrix} = 60$	IV. $x = 20$

Choose the correct answer from the options given below:

22 May Shift 1

Let A be a square matrix of order n, then which of the following are TRUE?

(A) $|adj A| = |A|^{n-1}$

(B) $|A. adj A| = |A|^n$

(D) $|KA| = K|A|$

(E) $|A^{-1}| = \frac{1}{|A|}, |A| \neq 0$

Choose the correct answer from the options given below: