CUET Mathematics 2026 14th May Shift 2 PYQs

Let A and B be square matrices of order 3 and k is a constant. If $|A| \neq 0$ and $|B| \neq 0$, where $|A|$ represents the determinant of A, then which of the following statements are true ? (where A' denotes the transpose of matrix A)

(A) $(AB)^{-1} = B^{-1} A^{-1}$

(B) $(A+B)' = A' \times B'$

(C) $(AB)' = A'B'$

(D) $|kA| = k^3 |A|$

(E) $|A'| = |A|$

Choose the correct answer from the options given below :

If $A=\begin{bmatrix}0 & b-a & c-a\\a-b & 0 & c-b\\a-c & b-c & 0\end{bmatrix}$ then the value of $\lvert A \rvert$ is

If A is an invertible matrix of order 3 and the determinant of A is 9, then the determinant of $A^{-1}$ is: